HCFC141b General Properties

General properties of HCFCs

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


HCFC-141b (1 ,1-dichloro-1-fluoroethane)


1,1-dichloro-1-fluoroethane (dichlorofluoroethane) is produced and used as a substitute for fully halogenated chlorofluorocarbons with comparable physical properties since it has more favourable environmental properties.

It is a volatile non flammable colourless liquid, with a weak ethereal odour and is slightly soluble in water. The low octanol/water partition coefficient (Pow = 2,3) indicates a low potential for bioaccumulation. The physical properties and results of acute ecotoxicity studies indicate that dichlorofluoroethane presents a low risk to the aquatic environment.


Chemical structure :

Chemical Formula :


Common name :

1,1-dichloro-1-fluoroethane, dichlorofluoroethane

Common synonyms :

  • Ethane 1,1-dichloro-1-fluoro
  • HFA 141b
  • HCFC 141b
  • R141b

Cas Registry Number :


Einecs Number :

not listed





Conversion factors :

1 ppm = 4.85 mg/m3 (20ºC, 1013 hPa)
1 mg/m3 = 0.206 ppm (20ºC, 1013 hPa)