Also Called: Freon, Unheated; Methane, chlorodifluoro-; Chlorodifluoromethane (FC-22);Chlorodifluoromethane (Hcfc-22);Chlorodifluoromethane;Chlordifluormethan;HCFC-22;(HCFC‑22);Difluorochloromethane;1-CHLORO-1,1-DIFLUOROMETHANE;FLUOROCARBON 22;CHLORODIFLOUROMETHANE;二氟一氯甲烷;Monochlorodifluoromethane;Freon 22;CHF2CL (HCFC-22);CHLORODIFLUOROMETHANE (FC 22);REFRIGERANT GAS R 22;CHLOR-DIFLUOR-METHAN;MONOCHLORODIFLUOROMETHANE (HCFC-22);Monochlorodifluorométhane;เอชซีเอฟซี-22