HCFC123 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-123 (2,2-dichloro-1,1,1- trifluoro-ethane)


1,1-Dichloro-2,2,2-trifluoroethane is a non-flammable, volatile, colourless liquid under ambient conditions and has a faint odour of ether. It is produced and used as a substitute for the fully halogenated chlorofluorocarbons with comparable physical properties since it has more favourable environmental properties.

Dichlorotrifluoroethane would not be considered to be readily biodegradable. Studies conducted in algae, Daphnia, and rainbow trout indicated a moderate level of toxicity to aquatic organisms. The octanol/water partition coefficient (Pow, = 2.0-2.8) is indicative of a low potential to bioaccumulate.

Joint Assessment of Commodity Chemicals No. 33
HCFC-123 (1,1-Dichloro-2,2,2-Trifluoroethane)
ECETOC, February 1996


Chemical structure :

Chemical Formula :


Common name :


Common synonyms :

  • 2,2-dichloro-1,1,1-trifluoroethane
  • Fluorocarbon 123
  • FC-123
  • HFA-123
  • HCFC-123
  • F-123
  • Ethane, dichlorotrifluoro-
  • Propellant 123
  • Refrigerant 123
  • R-123

Cas Registry Number :


Einecs Number :

206 190 3

Conversion factors

1 ppm = 6.25 mg/m3 at 25ºC
1 mg/m3 = 0.160 ppm at 25 ºC

Joint Assessment of Commodity Chemicals No. 33
HCFC-123 (1,1-Dichloro-2,2,2-Trifluoroethane)
ECETOC, February 1996