Code of Federal Regulations > Title 40 > Chapter I > Part 82 > Subpart A > Appendix Appendix B - Appendix B to Subpart A of Part 82

Regulations last checked for updates: Nov 04, 2025

Title 40 - Protection of Environment last revised: Sep 04, 2029

Appendix Appendix B - Appendix B to Subpart A of Part 82—Class II Controlled Substances a b

Controlled substance	ODP
1. HCFC-21 (CHFCl2) Dichlorofluoromethane	0.04
2. HCFC-22 (CHF2Cl) Monochlorodifluoromethane	0.055
3. HCFC-31 (CH2FCl) Monochlorofluoromethane	0.02
4. HCFC-121 (C2HFCl4) Tetrachlorofluoroethane	0.01-0.04
5. HCFC-122 (C2HF2Cl3) Trichlorodifluoroethane	0.02-0.08
6. HCFC-123 (C2HF3Cl2) Dichlorotrifluoroethane	0.02
7. HCFC-124 (C2HF4Cl) Monochlorotetrafluoroethane	0.022
8. HCFC-131 (C2H2FCl3) Trichlorofluoroethane	0.007-0.05
9. HCFC-132 (C2H2F2Cl2) Dichlorodifluoroethane	0.008-0.05
10. HCFC-133 (C2H2F3Cl) Monochlorotrifluoroethane	0.02-0.06
11. HCFC-141 (C2H3FCl2) Dichlorofluoroethane	0.005-0.07
12. HCFC-141b (CH3CFCl2) Dichlorofluoroethane	0.11
13. HCFC-142 (C2H3F2Cl) Chlorodifluoroethane	0.008-0.07
14. HCFC-142b (CH3CF2Cl) Monochlorodifluoroethane	0.065
15. HCFC-151 (C2H4FCl) Chlorofluoroethane	0.003-0.005
16. HCFC-221 (C3HFCl6) Hexachlorofluoropropane	0.015-0.07
17. HCFC-222 (C3HF2Cl5) Pentachlorodifluoropropane	0.01-0.09
18. HCFC-223 (C3HF3Cl4) Tetrachlorotrifluoropropane	0.01-0.08
19. HCFC-224 (C3HF4Cl3) Trichlorotetrafluoropropane	0.01-0.09
20. HCFC-225 (C3HF5Cl2) Dichloropentafluoropropane	0.02-0.07
21. HCFC-225ca (CF3CF2CHCl2) Dichloropentafluoropropane	0.025
22. HCFC-225cb (CF2ClCF2CHClF) Dichloropentafluoropropane	0.033
23. HCFC-226 (C3HF6Cl) Monochlorohexafluoropropane	0.02-0.1
24. HCFC-231 (C3H2FCl5) Pentachlorofluoropropane	0.05-0.09
25. HCFC-232 (C3H2F2Cl4) Tetrachlorodifluoropropane	0.008-0.1
26. HCFC-233 (C3H2F3Cl3) Trichlorotrifluoropropane	0.007-0.23
27. HCFC-234 (C3H2F4Cl2) Dichlorotetrafluoropropane	0.01-0.28
28. HCFC-235 (C3H2F5Cl) Monochloropentafluoropropane	0.03-0.52
29. HCFC-241 (C3H3FCl4) Tetrachlorofluoropropane	0.004-0.09
30. HCFC-242 (C3H3F2Cl3) Trichlorodifluoropropane	0.005-0.13
31. HCFC-243 (C3H3F3Cl2) Dichlorotrifluoropropane	0.007-0.12
32. HCFC-244 (C3H3F4Cl) Monochlorotetrafluoropropane	0.009-0.14
33. HCFC-251 (C3H4FCl3) Monochlorotetrafluoropropane	0.001-0.01
34. HCFC-252 (C3H4F2Cl2) Dichlorodifluoropropane	0.005-0.04
35. HCFC-253 (C3H4F3Cl) Monochlorotrifluoropropane	0.003-0.03
36. HCFC-261 (C3H5FCl2) Dichlorofluoropropane	0.002-0.02
37. HCFC-262 (C3H5F2Cl) Monochlorodifluoropropane	0.002-0.02
38. HCFC-271 (C3H6FCl) Monochlorofluoropropane	0.001-0.03

^a According to Annex C of the Montreal Protocol, “Where a range of ODPs is indicated, the highest value in that range shall be used for the purposes of the Protocol. The ODPs listed as single value have been determined from calculations based on laboratory measurements. Those listed as a range are based on estimates and are less certain. The range pertains to an isomeric group. The upper value is the estimate of the ODP of the isomer with the highest ODP, and the lower value is the estimate of the ODP of the isomer with the lowest ODP.

^b This table includes all isomers of the substances above, regardless of whether the isomer is explicitly listed on its own.

[79 FR 64288, Oct. 28, 2014]

authority: 42 U.S.C. 7414,7601,7671

source: 57 FR 33787, July 30, 1992, unless otherwise noted.