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A colorless, noncorrosive, and nonflammable gas that is used as a leak detecting agent and as a fire suppressant. Dichlorodifluoromethane was formerly used as an aerosol propellant and a refrigerant. Its use was banned in the late 20th century because of damage to atmospheric Ozone.

See also Chlorofluorocarbon.

Synonyms and Related Terms

Fluorocarbon-12; difluorodichloroethane; Freon 12; Genetron 12; Halon; Isotron 2


  • Overexposure to gas may cause dizziness, convulsions, coma and cardiac arrest due to asphyxiation.
  • The liquid may cause frostbite
  • Airgas: SDS

Physical and Chemical Properties

Soluble in ethanol and ether. Insoluble in water.

Composition CCl2F2
CAS 75-71-8
Melting Point -158 C
Density 1.5 g/ml
Molecular Weight mol. wt. = 120.9
Boiling Point -29.8 C