California Code of Regulations
Title 19 - Public Safety
Division 1 - State Fire Marshal
Chapter 3 - Fire Extinguishers
Article 6 - Inspection, Maintenance and Recharging
Section 578.9 - Carbon Dioxide Recharging

The vapor phase of carbon dioxide shall not be less than 99.5 percent carbon dioxide. The water content of the liquid phase shall not be more than 0.01 percent by weight [-30°F (-34.4°C) dew point]. Oil content of the carbon dioxide shall not exceed 10 ppm by weight.

NOTE: Carbon Dioxide obtained from dry ice converters will generally be unsatisfactory unless it is properly processed to remove excess water and oil. The preferred source of carbon dioxide for recharging extinguishers is from a low-pressure supply, either directly or via dry cylinders used as an intermediary means.

1. New section filed 3-4-92; operative 4-3-92 (Register 92, No. 15).
2. Renumbering of former section 578.9 to section 578.8 and renumbering of former section 578.11 to section 578.9 filed 12-27-2001; operative 1-1-2002 pursuant to Government Code section 11343.4 (Register 2001, No. 52).

Note: Authority: Section 13160, Health and Safety Code. Reference: Section 13160, Health and Safety Code.