Is a colorless gas under ordinary temperature and a colorless & transparent liquid under the pressure of itself, non-toxic & inflammable with the excellent thermo-stability and chemical stability, unable to erode metals and it is a refrigerant for low temperature to ﹣80℃ below. Used in reciprocating compressor, as refrigerant in industrial, commercial and household air-condition system; Also used to produce insecticide and aerosol for spraying paint