Chlorofluoromethane

Chlorofluoromethane or Freon 31 is the hydrochlorofluorocarbon (HCFC) with the formula CH2ClF. It is a colorless, odorless, flammable gas. 
Uses.
Pyrolysis of a mixture of dichlorofluoromethane and chlorofluoromethane gives hexafluorobenzene:
It was used as a refrigerant and has an ozone depletion potential of 0.02.
Additional data.
Its crystal structure is monoclinic with space group P21 and lattice constants "a" = 6.7676, "b" = 4.1477, "c" = 5.0206 (0.10−1 nm), β = 108.205°.
At an altitude of 22 km, traces of chlorofluoromethane occur (148 ppt).