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Class II Ozone-depleting Substances
| Chemical Name | Lifetime, in years | ODP5 (WMO 2006) | ODP4 (40 CFR Amend) | ODP3 (40 CFR) | ODP2 (Montreal Protocol) | ODP1 (WMO 2002) | GWP6 (WMO 2006) | GWP5 (SROC) | GWP4 (40 CFR) | GWP3 (TAR) | GWP2 (SAR) | GWP1 (WMO 2002) | CAS Number |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HCFC-21 (CHFCl2) Dichlorofluoromethane | 1.7 | 0.04 | 0.04 | 0.04 | 151 | 210 | 148 | 75-43-4 | |||||
| HCFC-22 (CHF2Cl) Monochlorodifluoromethane | 12 | 0.05 | 0.055 | 0.05 | 0.055 | 0.05 | 1810 | 1780 | 1700 | 1700 | 1500 | 1780 | 75-45-6 |
| HCFC-31 (CH2FCl) Monochlorofluoromethane | 0.02 | 0.02 | 0.02 | 593-70-4 | |||||||||
| HCFC-121 (C2HFCl4) Tetrachlorofluoroethane | 0.01- 0.04 | 0.01-0.04 | 0.01 - 0.04 | 354-14-3 | |||||||||
| HCFC-122 (C2HF2Cl3) Trichlorodifluoroethane | 0.02 - 0.08 | 0.02-0.08 | 0.02 - 0.08 | 354-21-2 | |||||||||
| HCFC-123 (C2HF3Cl2) Dichlorotrifluoroethane | 1.3 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 77 | 76 | 93 | 120 | 90 | 76 | 306-83-2 |
| HCFC-124 (C2HF4Cl) Monochlorotetrafluoroethane | 5.8 | 0.022 | 0.022 | 0.02 | 0.022 | 0.02 | 609 | 599 | 480 | 620 | 470 | 599 | 2837-89-0 |
| HCFC-131 (C2H2FCl3) Trichlorofluoroethane | 0.007-0.05 | 0.007-0.05 | 0.007 - 0.05 | 359-28-4 | |||||||||
| HCFC-132b (C2H2F2Cl2) Dichlorodifluoroethane | 0.008- 0.05 | 0.008 - 0.05 | 1649-08-7 | ||||||||||
| HCFC-133a (C2H2F3Cl) Monochlorotrifluoroethane | 0.02 - 0.06 | 0.02 - 0.06 | 75-88-7 | ||||||||||
| HCFC-141b (C2H3FCl2) Dichlorofluoroethane | 9.3 | 0.12 | 0.11 | 0.1 | 0.11 | 0.12 | 725 | 713 | 630 | 700 | 713 | 1717-00-6 | |
| HCFC-142b (C2H3F2Cl) Monochlorodifluoroethane | 17.9 | 0.07 | 0.065 | 0.06 | 0.065 | 0.07 | 2310 | 2270 | 2000 | 2400 | 1800 | 2270 | 75-68-3 |
| HCFC-221 (C3HFCl6) Hexachlorofluoropropane | 0.015 - 0.07 | 0.015-0.07 | 0.015 - 0.07 | 422-26-4 | |||||||||
| HCFC-222 (C3HF2Cl5) Pentachlorodifluoropropane | 0.01 - 0.09 | 0.01-0.09 | 0.01 - 0.09 | 422-49-1 | |||||||||
| HCFC-223 (C3HF3Cl4) Tetrachlorotrifluoropropane | 0.01 - 0.08 | 0.01-0.08 | 0.01 - 0.08 | 422-52-6 | |||||||||
| HCFC-224 (C3HF4Cl3) Trichlorotetrafluoropropane | 0.01 - 0.09 | 0.01-0.09 | 0.01 - 0.09 | 422-54-8 | |||||||||
| HCFC-225ca (C3HF5Cl2) Dichloropentafluoropropane | 1.9 | 0.02 | 0.025 | 0.025 | 0.02 | 122 | 120 | 170 | 180 | 120 | 422-56-0 | ||
| HCFC-225cb (C3HF5Cl2) Dichloropentafluoropropane | 5.8 | 0.03 | 0.033 | 0.033 | 0.03 | 595 | 586 | 530 | 620 | 586 | 507-55-1 | ||
| HCFC-226 (C3HF6Cl) Monochlorohexafluoropropane | 0.02-0.1 | 0.02 - 0.1 | 0.02 - 0.1 | 431-87-8 | |||||||||
| HCFC-231 (C3H2FCl5) Pentachlorofluoropropane | 0.05-0.09 | 0.05 - 0.09 | 0.05 - 0.09 | 421-94-3 | |||||||||
| HCFC-232 (C3H2F2Cl4) Tetrachlorodifluoropropane | 0.008-0.1 | 0.008 - 0.1 | 0.008 - 0.1 | 460-89-9 | |||||||||
| HCFC-233 (C3H2F3Cl3) Trichlorotrifluoropropane | 0.007-0.23 | 0.007 - 0.23 | 0.007 - 0.23 | 7125-84-0 | |||||||||
| HCFC-234 (C3H2F4Cl2) Dichlorotetrafluoropropane | 0.01-0.28 | 0.01 - 0.28 | 0.01 - 0.28 | 425-94-5 | |||||||||
| HCFC-235 (C3H2F5Cl) Monochloropentafluoropropane | 0.03-0.52 | 0.03 - 0.52 | 0.03 - 0.52 | 460-92-4 | |||||||||
| HCFC-241 (C3H3FCl4) Tetrachlorofluoropropane | 0.004-0.09 | 0.004 - 0.09 | 0.004 - 0.09 | 666-27-3 | |||||||||
| HCFC-242 (C3H3F2Cl3) Trichlorodifluoropropane | 0.005-0.13 | 0.005 - 0.13 | 0.005 - 0.13 | 460-63-9 | |||||||||
| HCFC-243 (C3H3F3Cl2) Dichlorotrifluoropropane | 0.007-0.12 | 0.007 - 0.12 | 0.007 - 0.12 | 460-69-5 | |||||||||
| HCFC-244 (C3H3F4Cl) Monochlorotetrafluoropropane | 0.009-0.14 | 0.009 - 0.14 | 0.009 - 0.14 | ||||||||||
| HCFC-251 (C3H4FCl3) Monochlorotetrafluoropropane | 0.001-0.01 | 0.001 - 0.01 | 0.001 - 0.01 | 421-41-0 | |||||||||
| HCFC-252 (C3H4F2Cl2) Dichlorodifluoropropane | 0.005-0.04 | 0.005 - 0.04 | 0.005 - 0.04 | 819-00-1 | |||||||||
| HCFC-253 (C3H4F3Cl) Monochlorotrifluoropropane | 0.003-0.03 | 0.003 - 0.03 | 0.003 - 0.03 | 460-35-5 | |||||||||
| HCFC-261 (C3H5FCl2) Dichlorofluoropropane | 0.002-0.02 | 0.002 - 0.02 | 0.002 - 0.02 | 420-97-3 | |||||||||
| HCFC-262 (C3H5F2Cl) Monochlorodifluoropropane | 0.002-0.02 | 0.002 - 0.02 | 0.002 - 0.02 | 421-02-03 | |||||||||
| HCFC-271 (C3H6FCl) Monochlorofluoropropane | 0.001-0.03 | 0.001 - 0.03 | 0.001 - 0.03 | 430-55-7 |
Why are there five values given for the ODPs and six values given for the GWPs?
- The numbers in the “ODP1” column are from Table 1-5 of The Scientific Assessment of Ozone Depletion, 2002, a report of the World Meteorological Association’s Global Ozone Research and Monitoring Project. The ODPs in the “ODP1” column that were not in Table 1-5 of the 2002 report have not been updated since 1998 and are from The Scientific Assessment of Ozone Depletion, 1998. The “ODP2” column numbers are from the Montreal Protocol, and the “ODP3” column numbers are from 40 CFR Part 82, stratospheric ozone protection regulations required by title VI of the Clean Air Act amendments. The “ODP4” numbers come from an amendment to 40 CFR Part 82 (as amended at 68 FR 42892, July 18, 2003). Data in the “ODP5” column come from WMO’s Scientific Assessment of Ozone Depletion: 2006. ODP values listed are semi-empirical and can be found in Table 8-1 of the document.
- All GWP values represent global warming potential over a 100-year time horizon. The numbers in the “GWP1” column are from Table 1-6 of The Scientific Assessment of Ozone Depletion, 2002, a report of the World Meteorological Association’s Global Ozone Research and Monitoring Project. The GWPs in the “GWP1” column that were not provided in Table 1-6 of the 2002 report have not been updated since 1998 and are from The Scientific Assessment of Ozone Depletion, 1998. “GWP2” column numbers are from the Intergovernmental Panel on Climate Change (IPCC
) Second Assessment Report: Climate Change 1995, “GWP3” column numbers are from the IPCC Third Assessment Report: Climate Change 2001, and “GWP4” column numbers are from 40 CFR Part 82, stratospheric ozone protection regulations required by title VI of the Clean Air Act amendments. The data in the “GWP5” column come from the IPCC Special Report on Safeguarding the Ozone Layer and the Global Climate System: Issues related to Hydrofluorocarbons and Perfluorocarbons (“SROC”). The values listed are for direct radiative forcing and can be found in Table 2.7 in the document. The numbers in the “GWP6” column come from the WMO’s Scientific Assessment of Ozone Depletion: 2006. The values listed are for direct radiative forcing and can be found in Table 8-2 of the document.
References
- WMO (World Meteorological Organization), Scientific Assessment of Ozone Depletion: 2006, Global Ozone Research and Monitoring Project—Report No. 50, 572 pp., Geneva, Switzerland, 2007. Also available at: http://www.wmo.ch/pages/prog/arep/gaw/ozone_2006/ozone_asst_report.html
- IPCC (Intergovernmental Panel on Climate Change). Special Report on Safeguarding the Ozone Layer and the Global Climate System: Issues Related to Hydrofluorocarbons and Perfluorocarbons, Special Report of the Intergovernmental Panel on Climate Change, Cambridge, England, 2005. Also available at: http://arch.rivm.nl/env/int/ipcc/pages_media/SROC-final/SpecialReportSROC.html