Physical and Chemical data can be found on producers websites HCFC-22 (chloro-difluoro-methane)
Chlorodifluoromethane is a non-flammable, colourless and nearly odourless gas under normal conditions. A large proportion is used as a chemical intermediate and therefore not emitted into the atmosphere. Other important uses are in refrigeration and in air conditioning systems; with present practice, most of the chlorodifluoromethane so used will eventually be emitted into the atmosphere.
Its moderate water solubility and low octanol/water partition coefficient indicate a negligible bioaccumulation potential. Contamination of water and food would not be expected from its physical and chemical properties and has not been reported.
Joint Assessment of Commodity Chemicals No. 9
ECETOC, October 19, 1989
1 ppm = 3.54 mg/m3
1 mg/ m3 = 0.282 ppm