39432-81-0 Chlorodifluoromethane and chloropentafluoroethane mixture of Refrigerant gas R 502 with fixed boiling point, with approximately 49 chlorodifluoromethane [UN1973] [Nonflammable gas] ETHANE, CHLOROPENTAFLUORO-, mixt. with CHLORODIFLUOROMETHANE R502 [UN1973] [Nonflammable gas] UN1973