HCFC is a compound family restricted by US EPA requirement as follows:
| Class II Ozone-depleting Substances |
| Chemical Name |
| HCFC-21 (CHFCl2) Dichlorofluoromethane |
| HCFC-22 (CHF2Cl) Monochlorodifluoromethane |
| HCFC-31 (CH2FCl) Monochlorofluoromethane |
| HCFC-121 (C2HFCl4) Tetrachlorofluoroethane |
| HCFC-122 (C2HF2Cl3) Trichlorodifluoroethane |
| HCFC-123 (C2HF3Cl2) Dichlorotrifluoroethane |
| HCFC-124 (C2HF4Cl) Monochlorotetrafluoroethane |
| HCFC-131 (C2H2FCl3) Trichlorofluoroethane |
| HCFC-132b (C2H2F2Cl2) Dichlorodifluoroethane |
| HCFC-133a (C2H2F3Cl) Monochlorotrifluoroethane |
| HCFC-141b (C2H3FCl2) Dichlorofluoroethane |
| HCFC-142b (C2H3F2Cl) Monochlorodifluoroethane |
| HCFC-221 (C3HFCl6) Hexachlorofluoropropane |
| HCFC-222 (C3HF2Cl5) Pentachlorodifluoropropane |
| HCFC-223 (C3HF3Cl4) Tetrachlorotrifluoropropane |
| HCFC-224 (C3HF4Cl3) Trichlorotetrafluoropropane |
| HCFC-225ca (C3HF5Cl2) Dichloropentafluoropropane |
| HCFC-225cb (C3HF5Cl2) Dichloropentafluoropropane |
| HCFC-226 (C3HF6Cl) Monochlorohexafluoropropane |
| HCFC-231 (C3H2FCl5) Pentachlorofluoropropane |
| HCFC-232 (C3H2F2Cl4) Tetrachlorodifluoropropane |
| HCFC-233 (C3H2F3Cl3) Trichlorotrifluoropropane |
| HCFC-234 (C3H2F4Cl2) Dichlorotetrafluoropropane |
| HCFC-235 (C3H2F5Cl) Monochloropentafluoropropane |
| HCFC-241 (C3H3FCl4) Tetrachlorofluoropropane |
| HCFC-242 (C3H3F2Cl3) Trichlorodifluoropropane |
| HCFC-243 (C3H3F3Cl2) Dichlorotrifluoropropane |
| HCFC-244 (C3H3F4Cl) Monochlorotetrafluoropropane |



