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

RegSenseOzone Depleting SubstancesCFR RegulationsEnvironmental Protection Agency (EPA)Air ProgramsEnvironmentalAir QualityCFR SectionOzone Layer ProtectionEnglishFocus AreaChlorofluorocarbonsUSA

Class II Controlled Substancesab
Controlled substanceODP
aAccording 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.
bThis table includes all isomers of the substances above, regardless of whether the isomer is explicitly listed on its own.
1. HCFC-21 (CHFCl2) Dichlorofluoromethane0.04
2. HCFC-22 (CHF2Cl) Monochlorodifluoromethane0.055
3. HCFC-31 (CH2FCl) Monochlorofluoromethane0.02
4. HCFC-121 (C2HFCl4) Tetrachlorofluoroethane0.01-0.04
5. HCFC-122 (C2HF2Cl3) Trichlorodifluoroethane0.02-0.08
6. HCFC-123 (C2HF3Cl2) Dichlorotrifluoroethane0.02
7. HCFC-124 (C2HF4Cl) Monochlorotetrafluoroethane0.022
8. HCFC-131 (C2H2FCl3) Trichlorofluoroethane0.007-0.05
9. HCFC-132 (C2H2F2Cl2) Dichlorodifluoroethane0.008-0.05
10. HCFC-133 (C2H2F3Cl) Monochlorotrifluoroethane0.02-0.06
11. HCFC-141 (C2H3FCl2) Dichlorofluoroethane0.005-0.07
12. HCFC-141b (CH3CFCl2) Dichlorofluoroethane0.11
13. HCFC-142 (C2H3F2Cl) Chlorodifluoroethane0.008-0.07
14. HCFC-142b (CH3CF2Cl) Monochlorodifluoroethane0.065
15. HCFC-151 (C2H4FCl) Chlorofluoroethane0.003-0.005
16. HCFC-221 (C3HFCl6) Hexachlorofluoropropane0.015-0.07
17. HCFC-222 (C3HF2Cl5) Pentachlorodifluoropropane0.01-0.09
18. HCFC-223 (C3HF3Cl4) Tetrachlorotrifluoropropane0.01-0.08
19. HCFC-224 (C3HF4Cl3) Trichlorotetrafluoropropane0.01-0.09
20. HCFC-225 (C3HF5Cl2) Dichloropentafluoropropane0.02-0.07
21. HCFC-225ca (CF3CF2CHCl2) Dichloropentafluoropropane0.025
22. HCFC-225cb (CF2ClCF2CHClF) Dichloropentafluoropropane0.033
23. HCFC-226 (C3HF6Cl) Monochlorohexafluoropropane0.02-0.1
24. HCFC-231 (C3H2FCl5) Pentachlorofluoropropane0.05-0.09
25. HCFC-232 (C3H2F2Cl4) Tetrachlorodifluoropropane0.008-0.1
26. HCFC-233 (C3H2F3Cl3) Trichlorotrifluoropropane0.007-0.23
27. HCFC-234 (C3H2F4Cl2) Dichlorotetrafluoropropane0.01-0.28
28. HCFC-235 (C3H2F5Cl) Monochloropentafluoropropane0.03-0.52
29. HCFC-241 (C3H3FCl4) Tetrachlorofluoropropane0.004-0.09
30. HCFC-242 (C3H3F2Cl3) Trichlorodifluoropropane0.005-0.13
31. HCFC-243 (C3H3F3Cl2) Dichlorotrifluoropropane0.007-0.12
32. HCFC-244 (C3H3F4Cl) Monochlorotetrafluoropropane0.009-0.14
33. HCFC-251 (C3H4FCl3) Monochlorotetrafluoropropane0.001-0.01
34. HCFC-252 (C3H4F2Cl2) Dichlorodifluoropropane0.005-0.04
35. HCFC-253 (C3H4F3Cl) Monochlorotrifluoropropane0.003-0.03
36. HCFC-261 (C3H5FCl2) Dichlorofluoropropane0.002-0.02
37. HCFC-262 (C3H5F2Cl) Monochlorodifluoropropane0.002-0.02
38. HCFC-271 (C3H6FCl) Monochlorofluoropropane0.001-0.03

[68 FR 2859, Jan. 21, 2003; 79 FR 64289, Oct. 28, 2014]

['Air Programs']
['Ozone Layer Protection', 'Chlorofluorocarbons', 'Ozone Depleting Substances']
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