Federal regulations · Through 2026-08-25 · Newer source version available

40 CFR Appendix B to Subpart A of Part 82: 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.

Where this section sits in the code

Title 40—Protection of Environment
CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
SUBCHAPTER C—AIR PROGRAMS
PART 82—PROTECTION OF STRATOSPHERIC OZONE
Subpart A—Production and Consumption Controls

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.

Collected 2026-08-27T02:26:04Z. Source file · JSON

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