California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 7 - General Industry Safety Orders
Group 16 - Control of Hazardous Substances
Article 109 - Hazardous Substances and Processes
Appendix A to Section 5189 - List of Acutely Hazardous Chemicals, Toxics and Reactives (Mandatory)

Universal Citation: 8 CA Code of Regs A to Section 5189
Current through Register 2024 Notice Reg. No. 38, September 20, 2024

CHEMICAL nameCAS*TQ**
Acetaldehyde75-07-02500
Acrolein (2-Propenal)107-02-8150
Acrylyl Chloride814-68-6250
Allyl Chloride107-05-11000
Allylamine107-11-91000
AlkylaluminumsVaries5000
Ammonia, Anhydrous7664-41-710000
Ammonia solutions ( > 44% ammonia by weight7664-41-715000
Ammonium Perchlorate7790-98-97500
Ammonium Permanganate7787-36-27500
Arsine (also called Arsenic Hydride)7784-42-1100
Bis(Chloromethyl) Ether542-88-1100
Boron Trichloride10294-34-52500
Boron Trifluoride7637-07-2250
Bromine7726-95-61500
Bromine Chloride13863-41-71500
Bromine Pentafluoride7789-30-22500
Bromine Trifluoride7787-71-515000
3-Bromopropyne (also called Propargyl Bromide)106-96-7100
Butyl Hydroperoxide (Tertiary)75-91-25000
Butyl Perbenzoate (Tertiary)614-45-97500
Carbonyl Chloride (see Phosgene)75-44-5100
Carbonyl Fluoride353-50-42500
Cellulose Nitrate (concentration > 12.6% nitrogen)9004-70-02500
Chlorine7782-50-51500
Chlorine Dioxide10049-04-41000
Chlorine Pentrafluoride13637-63-31000
Chlorine Trifluoride7790-91-21000
Chlorodiethylaluminum (also called Diethylaluminum Chloride)96-10-65000
1-Chloro-2,4-Dinitrobenzene97-00-75000
Chloromethyl Methyl Ether107-30-2500
Chloropicrin76-06-2500
Chloropicrin and Methyl Bromide mixtureNone1500
Chloropicrin and Methyl Chloride mixtureNone1500
Cumene Hydroperoxide80-15-95000
Cyanogen460-19-52500
Cyanogen Chloride506-77-4500
Cyanuric Fluoride675-14-9100
Diacetyl Peroxide (Concentration > 70%)110-22-55000
Diazomethane334-88-3500
Dibenzoyl Peroxide94-36-07500
Diborane19287-45-7100
Dibutyl Peroxide (Tertiary)110-05-45000
Dichloro Acetylene7572-29-4250
Dichlorosilane4109-96-02500
Diethylzinc557-20-010000
Diisopropyl Peroxydicarbonate105-64-67500
Dilaluroyl Peroxide105-74-87500
Dimethyldichlorosilane75-78-51000
Dimethylhydrazine, 1,1-57-14-71000
Dimethylamine, Anhydrous124-40-32500
2,4-Dinitroaniline97-02-95000
Ethyl Methyl Ketone Peroxide (also Methyl Ethyl Ketone Peroxide; concentration > 60%)1338-23-45000
Ethyl Nitrite109-95-55000
Ethylamine75-04-77500
Ethylene Fluorohydrin371-62-0100
Ethylene Oxide75-21-85000
Ethyleneimine151-56-41000
Fluorine7782-41-41000
Formaldehyde (Formalin)50-00-01000
Furan110-00-9500
Hexafluoroacetone684-16-25000
Hydrochloric Acid, Anhydrous7647-01-0500
Hydrofluoric Acid, Anhydrous7664-39-31000
Hydrogen Bromide10035-10-65000
Hydrogen Chloride7647-01-05000
Hydrogen Cyanide, Anhydrous74-90-81000
Hydrogen Fluoride7664-39-31000
Hydrogen Peroxide (52% by weight or greater7722-84-17500
Hydrogen Selenide7783-07-5150
Hydrogen Sulfide7783-06-41500
Hydroxylamine7803-49-82500
Iron, Pentacarbonyl13463-40-6250
Isopropylamine75-31-05000
Ketene463-51-4100
Methacrylaldehyde78-85-31000
Methacryloyl Chloride920-46-7150
Methacryloyloxyethyl Isocyanate30674-80-7100
Methyl Acrylonitrile126-98-7250
Methylamine, Anhydrous74-89-51000
Methyl Bromide74-83-92500
Methyl Chloride74-87-315000
Methyl Chloroformate79-22-1500
Methyl Ethyl Ketone Peroxide (concentration > 60%)1338-23-45000
Methyl Fluoroacetate453-18-9100
Methyl Fluorosulfate421-20-5100
Methyl Hydrazine60-34-4100
Methyl Iodide74-88-47500
Methyl Isocyanate624-83-9250
Methyl Mercaptan74-93-15000
Methyl Vinyl Ketone78-94-4100
Methyltrichlorosilane75-79-6500
Nickel Carbonly (Nickel Tetracarbonyl)13463-39-3150
Nitric Acid (94.5% by weight or greater)7697-37-2500
Nitric Oxide10102-43-9250
Nitroaniline (para Nitroaniline100-01-65000
Nitromethane75-52-52500
Nitrogen Dioxide10102-44-0250
Nitrogen Oxides (NO; NO 2; N204; N203)10102-44-0250
Nitrogen Tetroxide (also called Nitrogen Peroxide)10544-72-6250
Nitrogen Trifluoride7783-54-25000
Nitrogen Trioxide10544-73-7250
Oleum (65% to 80% by weight; also called Fuming Sulfuric Acid)8014-95-71000
Osmium Tetroxide20816-12-0100
Oxygen Difluoride (Fluorine Monoxide)7783-41-7100
Ozone10028-15-6100
Pentaborane19624-22-7100
Peracetic Acid (concentration > 60% Acetic Acid; also called Peroxyacetic Acid)79-21-01000
Perchloric Acid (concentration > 60% by weight)7601-90-35000
Perchloromethyl Mercaptan594-42-3150
Perchloryl Fluoride7616-94-65000
Peroxyacetic Acid (concentration > 60% Acetic Acid; also called Peracetic Acid)79-21-01000
Phosgene (also called Carbonyl Chloride)75-44-5100
Phosphine (Hydrogen Phosphide)7803-51-2100
Phosphorus Oxychloride (also called Phosphoryl Chloride)10025-87-31000
Phosphorus Trichloride7719-12-21000
Phosphoryl Chloride (also called Phosphorus Oxychloride)10025-87-31000
Propargyl Bromide106-96-7100
Propyl Nitrate627-3-42500
Sarin107-44-8100
Selenium Hexafluoride7783-79-11000
Stibine (Antimony Hydride)7803-52-3500
Sulfur Dioxide (liquid)7446-09-51000
Sulfur Pentafluoride5714-22-7250
Sulfur Tetrafluoride7783-60-0250
Sulfur Trioxide (also called Sulfuric Anhydride)7446-11-91000
Sulfuric Anhydride (also called Sulfur Trioxide)7446-11-91000
Tellurium Hexafluoride7783-80-4250
Tetrafluoroethylene116-14-35000
Tetrafluorohydrazine10036-47-25000
Tetramethyl Lead75-74-11000
Thionyl Chloride7719-09-7250
Trichloro (chloromethyl) Silane1558-25-4100
Trichloro (dichlorophenyl) Silane27137-85-52500
Trichlorosilane10025-78-25000
Trifluorochloroethylene79-38-910000
Trimethyoxysilane2487-90-31500

* Chemical Abstract Service Number.

** Threshold Quantity in Pounds (Amount necessary to be covered by this standard).

Note: Authority cited: Section 142.3, Labor Code. Reference: Sections 142.3 and 7856, Labor Code.

Disclaimer: These regulations may not be the most recent version. California 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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