New York Codes, Rules and Regulations
Title 12 - DEPARTMENT OF LABOR
Chapter I - Industrial Board Of Appeals
Subchapter A - The Industrial Code
Part 12 - Control Of Air Contaminants
Subpart 12-3 - Evidence Of Dangerous Air Contaminants
Section 12-3.1 - General
Universal Citation: 12 NY Comp Codes Rules and Regs ยง 12-3.1
Current through Register Vol. 46, No. 12, March 20, 2024
The existence of air contaminants consisting of or deriving from the substances named in the following tables in relative quantities greater than those set forth as to each substance shall constitute prima facie evidence that such contaminants are dangerous air contaminants, except when they exist only momentarily and infrequently. Prima facie evidence as to whether such contaminants in momentary and infrequent occurrences, or other air contaminants not named in the tables or lesser concentrations than those set forth in the following tables constitute dangerous air contaminants by reason of their existence in quantities tending to injure the health of employees shall include an opinion to that effect by a physician representing the industrial commissioner.
Note:
Petitions for variations pursuant to section 30 of the Labor Law from administrative orders issued on the basis of prima facie evidence of dangerous air contaminants will be decided by the board after review of reports of air tests and field investigations submitted to the board by the commissioner and a hearing which the petitioner will attend. The petitioner will be given opportunity to submit testimony, data and test results at the hearing to support his variation request.
TABLE I-Threshold Limit Values (T.L.V.)
(in alphabetical order)
| Substance | ppm(a) | mg/M3(b) | |
| Abate*........................................................................................................................................................................ | - | 15 | |
| Acetaldehyde............................................................................................................................................................ | 200 | 360 | |
| Acetic acid................................................................................................................................................................ | 10 | 25 | |
| Acetic anhydride....................................................................................................................................................... | 5 | 20 | |
| Acetone..................................................................................................................................................................... | 1,000 | 2,400 | |
| Acetonitrile................................................................................................................................................................ | 40 | 70 | |
| Acetylene dichloride, see 1,2 Dicloroethylene....................................................................................................... | |||
| Acetylene tetrabromide............................................................................................................................................................. | 1 | 14 | |
| Acrolein..................................................................................................................................................................... | 0.1 | 0.25 | |
| Acrylamide-skin........................................................................................................................................................ | - | 0.3 | |
| Acrylonitrile-skin....................................................................................................................................................... | 20 | 45 | |
| Aldrin-skin................................................................................................................................................................. | - | 0.25 | |
| Allyl alcohol-skin......................................................................................................................................................... | 2 | 5 | |
| Allyl chloride................................................................................................................................................................ | 1 | 3 | |
| C | Allyl glycidyl ether (AGE)................................................................................................................................................................................... | 10 | 45 |
| Allyl propyl disulfide..................................................................................................................................................................... | 2 | 12 | |
| 2-Aminoethanol, see Ethanolamine............................................................................................................................................................ | |||
| 2-Aminopyridine........................................................................................................................................................ | 0.5 | 2 | |
| Ammonia................................................................................................................................................................... | 50 | 35 | |
| Ammonium sulfamate (Ammate)............................................................................................................................. | - | 15 | |
| n-Amyl acetate........................................................................................................................................................... | 100 | 525 | |
| sec-Amyl acetate........................................................................................................................................................................ | 125 | 650 | |
| Aniline-skin................................................................................................................................................................. | 5 | 19 | |
| Anisidine (o,p-isomers)-skin............................................................................................................................................................................. | - | 0.5 | |
| Antimony & compounds (as Sb).................................................................................................................................................................................... | - | 0.5 | |
| ANTU (alpha naphthyl thiourea).................................................................................................................................................................................... | - | 0.3 | |
| Arsenic & compounds (as As).................................................................................................................................................................................... | - | 0.5 | |
| Arsine.......................................................................................................................................................................... | 0.05 | 0.2 | |
| Azinphos-methyl-skin................................................................................................................................................. | - | 0.2 | |
| Barium (soluble compounds)..................................................................................................................................................................................... | - | 0.5 | |
| C | Benzene (benzol)-skin............................................................................................................................................................................. | 25 | 80 |
| Benzidine-skin............................................................................................................................................................ | - | A | |
| p-Benzoquinone, see Quinone...................................................................................................................................................................... | |||
| Benzoyl peroxide...................................................................................................................................................................... | - | 5 | |
| Benzyl chloride....................................................................................................................................................................... | 1 | 5 | |
| Beryllium.................................................................................................................................................................... | - | 0.002 | |
| Biphenyl, see Diphenyl...................................................................................................................................................................... | |||
| Boron oxide............................................................................................................................................................................ | - | 15 | |
| Boron tribromide*....................................................................................................................................................... | 1 | - | |
| C | Boron trifluoride......................................................................................................................................................... | 1 | 3 |
| Bromine...................................................................................................................................................................... | 0.1 | 0.7 | |
| Bromine pentafluoride*............................................................................................................................................................. | 0.1 | - | |
| Bromoform-skin......................................................................................................................................................... | 0.5 | 5 | |
| Butadiene (1, 3-butadiene)..................................................................................................................................................................................... | 1,000 | 2,200 | |
| Butanethiol, see Butyl mercaptan.............................................................................................................................. | |||
| 2-Butanone.................................................................................................................................................................. | 200 | 590 | |
| 2-Butoxy ethanol (Butyl Cellosolve)-skin................................................................................................................... | 50 | 240 | |
| Butyl acetate (n-butyl acetate).................................................................................................................................... | 150 | 710 | |
| sec-Butyl acetate........................................................................................................................................................................ | 200 | 950 | |
| tert-Butyl acetate........................................................................................................................................................................ | 200 | 950 | |
| Butyl alcohol............................................................................................................................................................... | 100 | 300 | |
| sec-Butyl alcohol........................................................................................................................................................................ | 150 | 450 | |
| tert-Butyl alcohol........................................................................................................................................................................ | 100 | 300 | |
| C | Butylamine-skin.......................................................................................................................................................... | 5 | 15 |
| C | tert-Butyl chromate (as CrO 3 )-skin.......................................................................................................................... | - | 0.1 |
| n-Butyl glycidyl ether (BGE)....................................................................................................................................... | 50 | 270 | |
| Butyl mercaptan.......................................................................................................................................................... | 10 | 35 | |
| p-tert-Butyltoluene...................................................................................................................................................... | 10 | 60 | |
| Cadmium (Metal dust and soluble salts)................................................................................................................... | - | 0.2 | |
| Cadmium oxide fume......................................................................................................................................................................... | - | 0.1 | |
| Calcium arsenate.................................................................................................................................................... | - | 1 | |
| Calcium oxide......................................................................................................................................................... | - | 5 | |
| Camphor*.............................................................................................................................................................. | 2 | - | |
| Carbaryl (Sevin**)................................................................................................................................................................................ | - | 5 | |
| Carbon black......................................................................................................................................................... | - | 3.5 | |
| Carbon dioxide...................................................................................................................................................... | 5,000 | 9,000 | |
| Carbon disulfide-skin......................................................................................................................................................... | 20 | 60 | |
| Carbon monoxide................................................................................................................................................ | 50 | 55 | |
| Carbon tetrachloride-skin................................................................................................................................... | 10 | 65 | |
| Chlordane-skin................................................................................................................................................... | - | 0.5 | |
| Chlorinated camphene-skin.................................................................................................................................................. | - | 0.5 | |
| Chlorinated diphenyl oxide................................................................................................................................................................... | - | 0.5 | |
| Chlorine*............................................................................................................................................................. | 1 | - | |
| Chlorine dioxide................................................................................................................................................. | 0.1 | 0.3 | |
| C | Chlorine trifluoride............................................................................................................................................ | 0.1 | 0.4 |
| C | Chloroacetaldehyde........................................................................................................................................ | 1 | 3 |
| alpha-Chloroacetophenone (phenacylchloride)............................................................................................ | 0.05 | 0.3 | |
| Chlorobenzene (monochlorobenzene).......................................................................................................... | 75 | 350 | |
| o-Chlorobenzylidene malononitrile (OCBM).................................................................................................... | 0.05 | 0.4 | |
| Chlorobromomethane....................................................................................................................................... | 200 | 1,050 | |
| 2-Chloro-1, 3 butadiene, see Chloroprene..................................................................................................... | |||
| Chlorodiphenyl (42% Chlorine)-skin................................................................................................................ | - | 1 | |
| Chlorodiphenyl (54% Chlorine)-skin................................................................................................................ | - | 0.5 | |
| 1, Chloro, 2, 3, epoxypropane, see Epichlorhydrin...................................................................................... | |||
| 2, Chloroethanol, see Ethylene chlorohydrin.................................................................................................. | |||
| Chloroethylene, see Vinyl chloride.................................................................................................................. | |||
| C | Chloroform (trichloromethane)......................................................................................................................... | 50 | 240 |
| 1-Chloro-1-nitropropane................................................................................................................................... | 20 | 100 | |
| Chloropicrin....................................................................................................................................................... | 0.1 | 0.7 | |
| Chloroprene (2-chloro-1, 3-butadiene)-skin................................................................................................................................................................... | 25 | 90 | |
| Chromic acid and chromates (as CrO 3 )...................................................................................................... | - | 0.1 | |
| Chromium, sol. chromic, chromous salts (as Cr).......................................................................................... | - | 0.5 | |
| Metal and insoluble salts................................................................................................................................ | - | 1 | |
| Coal tar pitch volatiles (benzene soluble fraction, anthracene, BaP, phenanthrene, acridine, chrysene, pyrene).......................................................................................................................................................................... | - | 0.2 | |
| Cobalt, metal fume and dust........................................................................................................................... | - | 0.1 | |
| Copper fume.................................................................................................................................................... | - | 0.1 | |
| Dusts and mists................................................................................................................................................ | - | 1 | |
| Cotton dust (raw)............................................................................................................................................. | - | 1 | |
| Crag** herbicide.............................................................................................................................................. | - | 15 | |
| Cresol (all isomers)-skin................................................................................................................................. | 5 | 22 | |
| Crotonaldehyde............................................................................................................................................... | 2 | 6 | |
| Cumene-skin.................................................................................................................................................. | 50 | 245 | |
| Cyanide (as CN)-skin................................................................................................................................................................. | - | 5 | |
| Cyanogen*....................................................................................................................................................... | 10 | - | |
| Cyclohexane.................................................................................................................................................... | 300 | 1,050 | |
| Cyclohexanol.................................................................................................................................................. | 50 | 200 | |
| Cyclohexanone............................................................................................................................................... | 50 | 200 | |
| Cyclohexene................................................................................................................................................... | 300 | 1,015 | |
| Cyclopentadiene............................................................................................................................................. | 75 | 200 | |
| 2, 4-D............................................................................................................................................................... | - | 10 | |
| DDT-skin......................................................................................................................................................... | - | 1 | |
| DDVP-skin........................................................................................................................................................ | - | 1 | |
| Decaborane-skin............................................................................................................................................. | 0.05 | 0.3 | |
| Demeton**-skin............................................................................................................................................... | - | 0.1 | |
| Diacetone alcohol (4-methyl-2-pentanone)................................................................................................... | 50 | 240 | |
| 1, 2 Diaminoethane, see Ethyllenediamine................................................................................................... | |||
| Diazomethane.................................................................................................................................................. | 0.2 | 0.4 | |
| Diborane........................................................................................................................................................... | 0.1 | 0.1 | |
| C | 1, 2-Dibromoethane (ethylene dibromide)- skin............................................................................................. | 25 | 190 |
| Dibutyl phosphate............................................................................................................................................... | 1 | 5 | |
| Dibutylphthalate................................................................................................................................................. | - | 5 | |
| C | o-Dichlorobenzene........................................................................................................................................... | 50 | 300 |
| p-Dichlorobenzene............................................................................................................................................ | 75 | 450 | |
| Dichlorodifluoromethane................................................................................................................................... | 1,000 | 4,950 | |
| 1, 3-Dichloro-5, dimethyl hydantoin.............................................................................................................................................................. | - | 0.2 | |
| 1, 1-Dichloroethane............................................................................................................................................. | 100 | 400 | |
| 1, 2-Dichloroethane............................................................................................................................................ | 50 | 200 | |
| 1, 2-Dichloroethylene......................................................................................................................................... | 200 | 790 | |
| C | Dichloroethyl ether-skin............................................................................................................................................................ | 15 | 90 |
| Dichloromethane, see Methylenechloride.......................................................................................................... | |||
| Dichloromonofluoromethane.............................................................................................................................. | 1,000 | 4,200 | |
| C | 1, 1-Dichloro-1-nitroethane................................................................................................................................. | 10 | 60 |
| 1, 2-Dichloropropane, see Propylenedichloride................................................................................................. | |||
| Dichlorotetrafluoroethane..................................................................................................................................... | 1,000 | 7,000 | |
| Dieldrin-skin......................................................................................................................................................... | - | 0.25 | |
| Diethylamine.......................................................................................................................................................... | 25 | 75 | |
| Diethylamino ethanol-skin.................................................................................................................................... | 10 | 50 | |
| C | Diethylene triamine-skin...................................................................................................................................... | 10 | - |
| Diethylether, see Ethyl ether................................................................................................................................ | |||
| Difluorodibromomethane...................................................................................................................................... | 100 | 860 | |
| C | Diglycidyl ether (DGE).......................................................................................................................................... | 5.5 | 2.8 |
| Dihydroxybenzene, see Hydroquinone............................................................................................................... | |||
| Diisobutyl ketone................................................................................................................................................... | 50 | 290 | |
| Diisopropylamine-skin.......................................................................................................................................... | 5 | 20 | |
| Diphenyl amine*.................................................................................................................................................... | - | 10 | |
| Dimethoxymethane, see Methylal......................................................................................................................... | |||
| Dimethyl acetamide-skin....................................................................................................................................................... | 10 | 35 | |
| Dimethylamine....................................................................................................................................................... | 10 | 18 | |
| Dimethylaminobenzene, see Xylidene................................................................................................................. | |||
| Dimethylaniline (N-dimethylaniline)-skin................................................................................................................ | 5 | 25 | |
| Dimethylbenzene, see Xylene............................................................................................................................. | |||
| Dimethyl, 1, 2-dibromo-2, 2-dichloroethyl, (Dibrom)............................................................................................ | - | 3 | |
| Dimethylformamide-skin........................................................................................................................................ | 10 | 30 | |
| 2, 6 Dimethylheptanone, see Diisobutyl ketone................................................................................................... | |||
| 1, 1-Dimethylhydrazine-skin.................................................................................................................................. | 0.5 | 1 | |
| Dimethylphthalate.................................................................................................................................................. | - | 5 | |
| Dimethylsulfate-skin.............................................................................................................................................. | 1 | 5 | |
| Dinitrobenzene (all isomers)-skin......................................................................................................................... | - | 1 | |
| Dinitro-o-cresol-skin............................................................................................................................................. | - | 0.2 | |
| Dinitrotoluene-skin................................................................................................................................................ | - | 1.5 | |
| Dioxane (Diethylene dioxide)-skin........................................................................................................................ | 100 | 360 | |
| Diphenyl................................................................................................................................................................. | 0.2 | 1 | |
| Diphenyl Amine*..................................................................................................................................................... | - | 10 | |
| Diphenylmethane diisocyanate (see Methylene bisphenyl isocyanate) (MDI)................................................... | |||
| Dipropylene glycol methyl ether-skin..................................................................................................................... | 100 | 600 | |
| Di-sec, octyl phthalate (Di-2-ethylhexylphthalate)................................................................................................. | - | 5 | |
| Endrin-skin............................................................................................................................................................. | - | 0.1 | |
| Epichlorhydrin-skin................................................................................................................................................. | 5 | 19 | |
| EPN-skin................................................................................................................................................................. | - | 0.5 | |
| 1, 2-Epoxypropane, see Propyleneoxide...................................................................................................................................................... | |||
| 2, 3-Epoxy-1-propanol, see Glycidol.................................................................................................................................................................... | |||
| Ethanethiol, see Ethylmercaptan........................................................................................................................................................ | |||
| Ethanolamine............................................................................................................................................................ | 3 | 6 | |
| 2 Ethoxyethanol-skin................................................................................................................................................ | 200 | 740 | |
| 2 Ethoxyethylacetate (Cellosolve acetate)-skin...................................................................................................... | 100 | 540 | |
| Ethyl acetate............................................................................................................................................................. | 400 | 1,400 | |
| Ethyl acrylate-skin...................................................................................................................................................... | 25 | 100 | |
| Ethyl alcohol (ethanol)............................................................................................................................................... | 1,000 | 1,900 | |
| Ethylamine.................................................................................................................................................................. | 10 | 18 | |
| Ethyl sec-amyl ketone (5-methyl-3-heptanone)................................................................................................................................................................................... | 25 | 130 | |
| Ethyl benzene.................................................................................................................................................................... | 100 | 435 | |
| Ethyl bromide........................................................................................................................................................................... | 200 | 890 | |
| Ethyl butyl ketone (3-Heptanone)......................................................................................................................................................................................... | 50 | 230 | |
| Ethyl chloride............................................................................................................................................................................ | 1,000 | 2,600 | |
| Ethyl ether................................................................................................................................................................................. | 400 | 1,200 | |
| Ethyl formate................................................................................................................................................................... | 100 | 300 | |
| Ethyl mercaptan.............................................................................................................................................................. | 10 | 25 | |
| Ethyl silicate................................................................................................................................................................... | 100 | 850 | |
| Ethylene chlorohydrin-skin............................................................................................................................................. | 5 | 16 | |
| Ethylenediamine............................................................................................................................................................... | 10 | 25 | |
| Ethylene dibromide, see 1, 2-Dibromoethane.......................................................................................................................................................... | |||
| Ethylene dichloride, see 1, 2-Dichloroethane............................................................................................................................................................ | |||
| C | Ethylene glycol dinitrate and/or Nitrogylcerin- skin................................................................................................................................................................................... | 0.2(d) | 1 |
| Ethylene glycol monomethyl ether acetate, see Methyl cellosolve acetate.......................................................... | |||
| Ethylene imine-skin................................................................................................................................................... | 0.5 | 1 | |
| Ethylene oxide........................................................................................................................................................... | 50 | 90 | |
| Ethylidine chloride, see 1, 1-Dichloroethane.................................................................................................................................................... | |||
| N-Ethylmorpholine-skin.............................................................................................................................................. | 20 | 94 | |
| Ferbam............................................................................................................................................................................ | - | 15 | |
| Ferrovanadium dust.................................................................................................................................................... | - | 1 | |
| Fluoride (as F).............................................................................................................................................................. | - | 2.5 | |
| Fluorine.......................................................................................................................................................................... | 0.1 | 0.2 | |
| Fluorotrichloromethane............................................................................................................................................... | 1,000 | 5,600 | |
| C | Formaldehyde............................................................................................................................................................. | 5 | 6 |
| Formic acid.................................................................................................................................................................. | 5 | 9 | |
| Furfural-skin................................................................................................................................................................. | 5 | 20 | |
| Furfuryl alcohol......................................................................................................................................................... | 50 | 200 | |
| Gasoline................................................................................................................................................................ | - | A | |
| Gylcidol (2, 3-Epoxy-1-propanol).................................................................................................................................................................................. | 50 | 150 | |
| Gylcol monoethyl ether, see 2-Ethoxyethanol | |||
| Guthion**, see Azinphosmethyl.......................................................................................................................... | |||
| Hafnium...................................................................................................................................................... | - | 0.5 | |
| Heptachlor-skin.......................................................................................................................................... | - | 0.5 | |
| Heptane (n-heptane)............................................................................................................................. | 500 | 2,000 | |
| Hexachloroethane-skin...................................................................................................................................... | 1 | 10 | |
| Hexachloronaphthalene-skin............................................................................................................................. | - | 0.2 | |
| Hexane (n-hexane)............................................................................................................................................ | 500 | 1,800 | |
| 2-Hexanone........................................................................................................................................................ | 100 | 410 | |
| Hexone............................................................................................................................................................... | 100 | 410 | |
| sec-Hexyl acetate............................................................................................................................................. | 50 | 300 | |
| Hydrazine-skin................................................................................................................................................... | 1 | 1.3 | |
| Hydrogen bromide............................................................................................................................................. | 3 | 10 | |
| C | Hydrogen chloride................................................................................................................................................ | 5 | 7 |
| Hydrogen cyanide-skin........................................................................................................................................ | 10 | 11 | |
| Hydrogen fluoride................................................................................................................................................. | 3 | 2 | |
| Hydrogen peroxide, 90%.................................................................................................................................... | 1 | 1.4 | |
| Hydrogen selenide.............................................................................................................................................. | 0.05 | 0.2 | |
| Hydrogen sulfide.............................................................................................................................................. | 10 | 15 | |
| Hydroquinone.............................................................................................................................................. | - | 2 | |
| Indium and compounds (as In)*...................................................................................................................... | - | 0.1 | |
| C | Iodine................................................................................................................................................................ | 0.1 | 1 |
| Iron oxide fume.................................................................................................................................................. | - | 10 | |
| Iron salts, soluble (as Fe)*................................................................................................................................... | - | 1 | |
| Isoamyl acetate...................................................................................................................................................... | 100 | 525 | |
| Isoamyl alcohol...................................................................................................................................................... | 100 | 360 | |
| Isobutyl acetate...................................................................................................................................................... | 150 | 700 | |
| Isobutyl alcohol...................................................................................................................................................... | 100 | 300 | |
| Isophorone.............................................................................................................................................................. | 25 | 140 | |
| Isopropyl acetate...................................................................................................................................................... | 250 | 950 | |
| Isopropyl alcohol...................................................................................................................................................... | 400 | 980 | |
| Isopropylamine...................................................................................................................................................... | 5 | 12 | |
| Isopropylether...................................................................................................................................................... | 500 | 2,100 | |
| Isopropyl glycidyl ether (IGE)............................................................................................................................ | 50 | 240 | |
| Ketone............................................................................................................................................................. | 0.5 | 0.9 | |
| Lead................................................................................................................................................................... | - | 0.2 | |
| Lead arsenate................................................................................................................................................ | - | 0.15 | |
| Lindane-skin.................................................................................................................................................... | - | 0.5 | |
| Lithium hydride................................................................................................................................................... | - | 0.025 | |
| L.P.G. (Liquified petroleum gas)........................................................................................................................ | 1,000 | 1,800 | |
| Magnesium oxide fume........................................................................................................................................ | - | 15 | |
| Malathion-skin.................................................................................................................................................... | - | 15 | |
| Maleic anhydride................................................................................................................................................. | 0.25 | 1 | |
| C | Manganese........................................................................................................................................................... | - | 5 |
| Mercury-skin........................................................................................................................................................... | - | 0.1 | |
| Mercury (organic compounds)-skin......................................................................................................................................................................... | - | 0.01 | |
| Mesityl oxide.............................................................................................................................................................. | 25 | 100 | |
| Methanethiol, see Methyl mercaptan.................................................................................................................................................................. | |||
| Methoxychlor............................................................................................................................................................... | - | 15 | |
| 2-Methoxyethanol, see Methyl cellosolve................................................................................................................ | |||
| Methyl acetate.............................................................................................................................................................. | 200 | 610 | |
| Methyl acetylene (propyne)...................................................................................................................................................................................... | 1,000 | 1,650 | |
| Methyl acetylene-propadiene mixture (MAPP)..................................................................................................................................................................................... | 1,000 | 1,800 | |
| Methyl acrylate-skin.................................................................................................................................................... | 10 | 35 | |
| Methylal (dimethoxymethane).................................................................................................................................... | 1,000 | 3,100 | |
| Methyl alcohol (methanol)........................................................................................................................................... | 200 | 260 | |
| Methylamine................................................................................................................................................................ | 10 | 12 | |
| Methyl amyl alcohol, see Methyl isobutyl carbinol.................................................................................................. | |||
| Methyl (n-amyl) ketone (2-Heptanone)..................................................................................................................... | 100 | 465 | |
| C | Methyl bromide-skin................................................................................................................................................... | 20 | 80 |
| Methyl butyl ketone, see 2-Hexanone.............................................................................................................................................................. | |||
| Methyl cellosolve-skin.............................................................................................................................................. | 25 | 80 | |
| Methyl cellosolve acetate-skin................................................................................................................................................................. | 25 | 120 | |
| C | Methyl chloride............................................................................................................................................................ | 100 | 210 |
| Methyl chloroform....................................................................................................................................................... | 350 | 1,900 | |
| Methylcyclohexane.................................................................................................................................................... | 500 | 2,000 | |
| Methylcyclohexanol.................................................................................................................................................. | 100 | 470 | |
| o-Methylcyclohexanone-skin..................................................................................................................................... | 100 | 460 | |
| Methyl ethyl ketone (MEK), see 2-Butanone................................................................................................................................................................. | |||
| Methyl formate........................................................................................................................................................... | 100 | 250 | |
| Methyl iodide-skin........................................................................................................................................................ | 5 | 28 | |
| Methyl isobutyl carbinol-skin................................................................................................................................................................. | 25 | 100 | |
| Methyl isobutyl ketone, see Hexone................................................................................................................................................................. | |||
| Methyl isocyanate-skin...................................................................................................................................................... | 0.22 | 0.05 | |
| C | Methyl mercaptan.................................................................................................................................................. | 10 | 20 |
| Methyl methacrylate................................................................................................................................................. | 100 | 410 | |
| Methyl propyl ketone, see 2-Pentanone............................................................................................................................................................ | |||
| C | Methyl silicate*........................................................................................................................................................ | 5 | - |
| C | alpha-Methyl styrene................................................................................................................................................................. | 100 | 480 |
| C | Methylene bisphenyl isocyanate (MDI)................................................................................................................................................................................ | 0.02 | 0.2 |
| Methylene chloride (dichloromethane).................................................................................................................................................................................... | 500 | 1,740 | |
| Molybdenum (soluble compounds).................................................................................................................................................................................. | - | 5 | |
| (insoluble compounds)................................................................................................................................................................................. | - | 15 | |
| Monomethyl aniline-skin............................................................................................................................................................ | 2 | 9 | |
| C | Monomethyl hydrazine-skin...................................................................................................................................................... | 0.2 | 0.35 |
| Morpholine-skin...................................................................................................................................................... | 20 | 70 | |
| Naphtha (coal tar)................................................................................................................................................. | 100 | 400 | |
| Naphthalene........................................................................................................................................................... | 10 | 50 | |
| beta-Naphthylamine................................................................................................................................................. | - | A | |
| Nickel carbonyl........................................................................................................................................................ | 0.001 | 0.007 | |
| Nickel, metal and soluble compounds............................................................................................................................................................. | - | 1 | |
| Nicotine-skin............................................................................................................................................................ | - | 0.5 | |
| Nitric acid................................................................................................................................................................. | 2 | 5 | |
| Nitric oxide................................................................................................................................................................. | 25 | 30 | |
| p-Nitroaniline-skin...................................................................................................................................................... | 1 | 6 | |
| Nitrobenzene-skin......................................................................................................................................................... | 1 | 5 | |
| p-Nitrochloro-benzene-skin........................................................................................................................................ | - | 1 | |
| Nitroethane................................................................................................................................................................. | 100 | 310 | |
| C | Nitrogen dioxide......................................................................................................................................................... | 5 | 9 |
| Nitrogen Trifluoride................................................................................................................................................................. | 10 | 29 | |
| C | Nitroglycerin-skin....................................................................................................................................................... | 0.2 | 2 |
| Nitromethane................................................................................................................................................................. | 100 | 250 | |
| 1-Nitropropane................................................................................................................................................................. | 25 | 90 | |
| 2-Nitropropane................................................................................................................................................................. | 25 | 90 | |
| N-Nitrosodimethyl-amine (Dimethyl-nitrosoamine)-skin................................................................................................ | - | A | |
| Nitrotoluene-skin.......................................................................................................................................................... | 5 | 30 | |
| Nitrotrichloromethane, see Chloropicrin................................................................................................................................................................. | |||
| Octachloronaphthalene-skin..................................................................................................................................... | - | 0.1 | |
| Octane................................................................................................................................................................. | 500 | 2,350 | |
| Oil mist (mineral)....................................................................................................................................................... | - | 5 | |
| Osmium tetroxide....................................................................................................................................................... | - | 0.002 | |
| Oxalic acid................................................................................................................................................................. | - | 1 | |
| Oxygen difluoride...................................................................................................................................................... | 0.05 | 0.1 | |
| Ozone................................................................................................................................................................. | 0.1 | 0.2 | |
| Paraquat-skin.......................................................................................................................................................... | - | 0.5 | |
| Parathion-skin........................................................................................................................................................ | - | 0.1 | |
| Pentaborane............................................................................................................................................... | 0.005 | 0.01 | |
| Pentachloronaphthalene-skin................................................................................................................... | - | 0.5 | |
| Pentachlorophenol-skin................................................................................................................................. | - | 0.5 | |
| Pentane..................................................................................................................................................... | 1,000 | 2,950 | |
| 2-Pentanone............................................................................................................................................. | 200 | 700 | |
| Perchloroethylene..................................................................................................................................... | 100 | 670 | |
| Perchloromethyl mercaptan................................................................................................................................................... | 0.1 | 0.8 | |
| Perchloryl fluoride................................................................................................................................... | 3 | 13.5 | |
| Petroleum Distillates (naphtha)................................................................................................................ | 500 | 2,000 | |
| Phenol-skin................................................................................................................................................. | 5 | 19 | |
| p-Phenylene diamine-skin........................................................................................................................ | - | 0.1 | |
| Phenyl ether (vapor)................................................................................................................................. | 1 | 7 | |
| Phenyl ether-Biphenyl mixture (vapor)................................................................................................... | 1 | 7 | |
| Phenylethylene, see Styrene...................................................................................................................................................... | |||
| Phenyl glycidyl ether (PGE)................................................................................................................................................................. | 10 | 60 | |
| Phenylhydrazine-skin.................................................................................................................................. | 5 | 22 | |
| Phosdrln (Mevinphos**)-skin........................................................................................................................................................... | - | 0.1 | |
| Phosgene (carbonyl chloride)................................................................................................................................................................. | 0.1 | 0.4 | |
| Phosphine................................................................................................................................................ | 0.3 | 0.4 | |
| Phosphoric acid........................................................................................................................................ | - | 1 | |
| Phosphorus (yellow)................................................................................................................................... | - | 0.1 | |
| Phosphorus pentachloride......................................................................................................................... | - | 1 | |
| Phosphorus pentasulfide.................................................................................................................................................. | - | 1 | |
| Phosphorus trichloride....................................................................................................................................................... | 0.5 | 3 | |
| Phthalic anhydride......................................................................................................................................... | 2 | 12 | |
| Picric acid-skin.............................................................................................................................................. | - | 0.1 | |
| Pival** (2-Pivalyl-1, 3-indandione)...................................................................................................................................................................... | - | 0.1 | |
| Platinum (soluble salts)......................................................................................................................................................................... | - | 0.002 | |
| Polytetrafluoroethylene decomposition products.......................................................................................................................................................... | - | A2 | |
| Propane........................................................................................................................................................... | 1,000 | 1,800 | |
| beta-Propiolactone......................................................................................................................................... | - | A1 | |
| Propargyl alcohol-skin*................................................................................................................................... | 1 | - | |
| n-Propyl acetate........................................................................................................................................... | 200 | 840 | |
| Propyl alcohol................................................................................................................................................ | 200 | 500 | |
| n-Propyl nitrate............................................................................................................................................. | 25 | 110 | |
| Propylene dichloride..................................................................................................................................... | 75 | 350 | |
| Propylene imine-skin.................................................................................................................................. | 2 | 5 | |
| Propylene oxide......................................................................................................................................... | 100 | 240 | |
| Propyne, see Methylacetylene............................................................................................................................................ | |||
| Pyrethrum.................................................................................................................................................... | - | 5 | |
| Pyridine..................................................................................................................................................... | 5 | 15 | |
| Quinone...................................................................................................................................................... | 0.1 | 0.4 | |
| RDX-skin*.................................................................................................................................................... | - | 1.5 | |
| Rhodium, Metal fume and dusts................................................................................................................................................................. | - | 0.1 | |
| Soluble salts............................................................................................................................................. | - | 0.001 | |
| Ronnel....................................................................................................................................................... | - | 15 | |
| Rotenone (commercial)................................................................................................................................................................. | - | 5 | |
| Selenium compounds (as Se)................................................................................................................................................................. | - | 0.2 | |
| Selenium hexafluoride.............................................................................................................................. | 0.05 | 0.4 | |
| Silver, Metal and soluble compounds................................................................................................................................................... | - | 0.01 | |
| Sodium fluoroacetate (1080)-skin................................................................................................................................................................. | - | 0.05 | |
| Sodium hydroxide............................................................................................................................................ | - | 2 | |
| Stibine................................................................................................................................................................. | 0.1 | 0.5 | |
| Stoddard solvent............................................................................................................................................. | 500 | 2,900 | |
| Strychnine.................................................................................................................................................. | - | 0.15 | |
| C | Styrene monomer (phenylethylene)................................................................................................................................................................. | 100 | 420 |
| Sulfur dioxide.............................................................................................................................................. | 5 | 13 | |
| Sulfur hexafluoride........................................................................................................................................ | 1,000 | 6,000 | |
| Sulfuric acid................................................................................................................................................ | - | 1 | |
| Sulfur monochloride....................................................................................................................................... | 1 | 6 | |
| Sulfur pentafluoride...................................................................................................................................... | 0.025 | 0.25 | |
| Sulfuryl fluoride............................................................................................................................................. | 5 | 20 | |
| Systox, see Demeton**..................................................................................................................................................... | |||
| 2, 4, 5, T.......................................................................................................................................................... | - | 10 | |
| Tantalum...................................................................................................................................................... | - | 5 | |
| TEDP-skin.................................................................................................................................................. | - | 0.2 | |
| Teflon** decomposition products......................................................................................................................................................... | - | A2 | |
| Tellurium...................................................................................................................................................... | - | 0.1 | |
| Tellurium hexafluoride.................................................................................................................................. | 0.02 | 0.2 | |
| TEPP-skin.................................................................................................................................................... | - | 0.05 | |
| C | Terphenyls.................................................................................................................................................... | 1 | 9 |
| 1, 1, 1, 2-Tetrachloro-2, 2-difluoroethane............................................................................................................................................ | 500 | 4,170 | |
| 1, 1, 2, 2-Tetrachloro-1, 2-difluoroethane........................................................................................................................................... | 500 | 4,170 | |
| 1, 1, 2, 2-Tetrachloroethane-skin.................................................................................................................. | 5 | 35 | |
| Tetrachloroethylene, see Perchloroethylene........................................................................................................................................ | |||
| Tetrachloromethane, see Carbon tetrachloride.......................................................................................... | |||
| Tetrachloronaphthalene-skin....................................................................................................................... | - | 2 | |
| Tetraethyl lead (as Pb)-skin.......................................................................................................................... | - | 0.075 | |
| Tetrahydrofuran........................................................................................................................................... | 200 | 590 | |
| Tetramethyl lead (TML) (as Pb)-skin................................................................................................................................................................... | - | 0.075 | |
| Tetramethyl succinonitrile-skin............................................................................................................................................. | 0.5 | 3 | |
| Tetranitromethane............................................................................................................................................. | 1 | 8 | |
| Tetryl (2, 4, 6-trinitrophenylmethylnitramine)-skin............................................................................................ | - | 1.5 | |
| Thallium (soluble compounds)-skin................................................................................................................ | - | 0.1 | |
| Thiram.................................................................................................................................................................. | - | 5 | |
| Tin (inorganic compounds, except SnH 4 and SnO 2 )..................................................................................... | - | 2 | |
| Tin (organic compounds)................................................................................................................................... | - | 0.1 | |
| Titanium dioxide.................................................................................................................................................... | - | 15 | |
| Toluene (toluol)..................................................................................................................................................... | 200 | 750 | |
| C | Toluene-2, 4-diisocyanate....................................................................................................................................................... | 0.02 | 0.14 |
| o-Toluidine-skin...................................................................................................................................................... | 5 | 22 | |
| Toxaphene, see Chlorinated camphene.............................................................................................................. | |||
| Tributyl phosphate............................................................................................................................................... | - | 5 | |
| 1, 1, 1-Trichloroethane, see Methyl chloroform.................................................................................................... | |||
| 1, 1, 2-Trichloroethane-skin.................................................................................................................................. | 10 | 45 | |
| Trichloroethylene.................................................................................................................................................... | 100 | 535 | |
| Trichloromethane, see Chloroform...................................................................................................................... | |||
| Trichloronaphthalene-skin...................................................................................................................................... | - | 5 | |
| 1, 2, 3-Trichloropropane....................................................................................................................................... | 50 | 300 | |
| 1, 1, 2-Trichloro 1, 2, 2-trifluoroethane........................................................................................................................................................ | 1,000 | 7,600 | |
| Triethylamine............................................................................................................................................................ | 25 | 100 | |
| Trifluoromonobromomethane................................................................................................................................. | 1,000 | 6,100 | |
| 2, 4, 6-Trinitrophenol, see Picric acid........................................................................................................................................................................ | |||
| 2, 4, 6-Trinitrophenylmethylnitramine, see Tetryl................................................................................................. | |||
| Trinitrotoluene-skin.................................................................................................................................................. | - | 1.5 | |
| Triorthocresyl phosphate........................................................................................................................................ | - | 0.1 | |
| Triphenyl phosphate.................................................................................................................................................................. | - | 3 | |
| Tungsten and compounds, as W soluble*......................................................................................................................................................................... | - | 1 | |
| Insoluble...................................................................................................................................................................... | - | 5 | |
| Turpentine...................................................................................................................................................................... | 100 | 560 | |
| Uranium (natural), soluble and insoluble compounds, (as U)*................................................................................... | - | 0.2 | |
| C | Vanadium (V 2 O 5 dust)............................................................................................................................................. | - | 0.5 |
| (V 2 O 5 fume)............................................................................................................................................................ | - | 0.1 | |
| Vinyl benzene, see Styrene......................................................................................................................................................................... | |||
| C | Vinyl chloride................................................................................................................................................................. | 500 | 1,300 |
| Vinylcyanide, see Acrylonitrile................................................................................................................................................................. | |||
| Vinyl toluene................................................................................................................................................................ | 100 | 480 | |
| Warfarin........................................................................................................................................................................ | - | 0.1 | |
| Xylene (xylol)............................................................................................................................................................... | 100 | 435 | |
| Xylidine-skin............................................................................................................................................................... | 5 | 25 | |
| Yttrium........................................................................................................................................................................... | - | 1 | |
| Zinc chloride fume......................................................................................................................................................... | - | 1 | |
| Zinc oxide fume............................................................................................................................................................... | - | 5 | |
| Zirconium compounds (as Zr)......................................................................................................................................... | - | 5 |
____
(a) Parts of vapor or gas per million parts of contaminated air by volume at 25 degrees Centigrade and 760 mm. Hg pressure.
(b) Approximate milligrams of particulate per cubic meter of air.
(d) An atmospheric concentration of not more than 0.02 ppm, or personal protection may be necessary to avoid headache.
* 1969 addition.
** Registered trade name.
A No exposure or contact permitted by any route (respiratory, oral or skin).
C Ceiling limit which shall not be exceeded even momentarily or infrequently.
A1 No exposure or contact permitted by any route (respiratory, oral or skin).
A2 No TLV recommended pending termination of toxicity or products, but air concentrations should be minimal.
TABLE II-Mineral Dusts
| Substance | Million Particles Per Cubic Foot* |
| Asbestos | 5 |
| Dust (nuisance, no free silica) | 50 |
| Graphite (natural) | 15 |
| Mica (below 1% free silica) | 20 |
| Portland cement | 50 |
| Silica- | |
| Class I** | 50 |
| Class II** | 20 |
| Class III** | 10 |
| Class IV** | 5 |
| Slate (below 1% free silica) | 50 |
| Soapstone (below 1% free silica) | 20 |
| Talc (below 1% free silica) | 20 |
| Tremolite | 5 |
| Total dust (below 1% free silica) | 50 |
____
* Using the light field low-power method of counting as described in the U.S. Public Health Report 47 No. 12, March 12, 1932, pp. 669-672 or its equivalent and a standard type impinger or other equivalent instrument for taking atmospheric dust samples.
** Class I rock. Any rock formation uniformly containing up to and including 5%, by weight, of free silicon dioxide.
** Class II rock. Any rock formation uniformly containing more than 5%, up to and including 10%, by weight, of free silicon dioxide.
** Class III rock. Any rock formation uniformly containing more than 10%, up to and including 40%, by weight, of free silicon dioxide.
** Class IV rock. Any rock formation containing more than 40%, by weight, of free silicon dioxide.
Disclaimer: These regulations may not be the most recent version. New York may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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