Jump to main content.


Class II Ozone-depleting Substances

Chemical Name Lifetime, in years ODP3 (WMO 2006) ODP2 (40 CFR 82) ODP1 (Montreal Protocol) GWP5 (WMO 2006) GWP4 (SROC) GWP3 (40 CFR) GWP2 (TAR) GWP1 (WMO 2002) CAS Number
HCFC-21 (CHFCl2) Dichlorofluoromethane 1.7 0.04 0.04 151 210 148 75-43-4
HCFC-22 (CHF2Cl) Monochlorodifluoromethane 12 0.05 0.055 0.055 1810 1780 1700 1700 1780 75-45-6
HCFC-31 (CH2FCl) Monochlorofluoromethane 0.02 0.02 593-70-4
HCFC-121 (C2HFCl4) Tetrachlorofluoroethane 0.01- 0.04 0.01-0.04 354-14-3
HCFC-122 (C2HF2Cl3) Trichlorodifluoroethane 0.02 - 0.08 0.02-0.08 354-21-2
HCFC-123 (C2HF3Cl2) Dichlorotrifluoroethane 1.3 0.02 0.02 0.02 77 76 93 120 76 306-83-2
HCFC-124 (C2HF4Cl) Monochlorotetrafluoroethane 5.8 0.022 0.022 0.022 609 599 480 620 599 2837-89-0
HCFC-131 (C2H2FCl3) Trichlorofluoroethane 0.007-0.05 0.007-0.05 359-28-4
HCFC-132b (C2H2F2Cl2) Dichlorodifluoroethane 0.008- 0.05 1649-08-7
HCFC-133a (C2H2F3Cl) Monochlorotrifluoroethane 0.02 - 0.06 75-88-7
HCFC-141b (C2H3FCl2) Dichlorofluoroethane 9.3 0.12 0.11 0.11 725 713 630 700 713 1717-00-6
HCFC-142b (C2H3F2Cl) Monochlorodifluoroethane 17.9 0.07 0.065 0.065 2310 2270 2000 2400 2270 75-68-3
HCFC-221 (C3HFCl6) Hexachlorofluoropropane 0.015 - 0.07 0.015-0.07 422-26-4
HCFC-222 (C3HF2Cl5) Pentachlorodifluoropropane 0.01 - 0.09 0.01-0.09 422-49-1
HCFC-223 (C3HF3Cl4) Tetrachlorotrifluoropropane 0.01 - 0.08 0.01-0.08 422-52-6
HCFC-224 (C3HF4Cl3) Trichlorotetrafluoropropane 0.01 - 0.09 0.01-0.09 422-54-8
HCFC-225ca (C3HF5Cl2) Dichloropentafluoropropane 1.9 0.02 0.025 0.025 122 120 170 180 120 422-56-0
HCFC-225cb (C3HF5Cl2) Dichloropentafluoropropane 5.8 0.03 0.033 0.033 595 586 530 620 586 507-55-1
HCFC-226 (C3HF6Cl) Monochlorohexafluoropropane 0.02-0.1 0.02 - 0.1 431-87-8
HCFC-231 (C3H2FCl5) Pentachlorofluoropropane 0.05-0.09 0.05 - 0.09 421-94-3
HCFC-232 (C3H2F2Cl4) Tetrachlorodifluoropropane 0.008-0.1 0.008 - 0.1 460-89-9
HCFC-233 (C3H2F3Cl3) Trichlorotrifluoropropane 0.007-0.23 0.007 - 0.23 7125-84-0
HCFC-234 (C3H2F4Cl2) Dichlorotetrafluoropropane 0.01-0.28 0.01 - 0.28 425-94-5
HCFC-235 (C3H2F5Cl) Monochloropentafluoropropane 0.03-0.52 0.03 - 0.52 460-92-4
HCFC-241 (C3H3FCl4) Tetrachlorofluoropropane 0.004-0.09 0.004 - 0.09 666-27-3
HCFC-242 (C3H3F2Cl3) Trichlorodifluoropropane 0.005-0.13 0.005 - 0.13 460-63-9
HCFC-243 (C3H3F3Cl2) Dichlorotrifluoropropane 0.007-0.12 0.007 - 0.12 460-69-5
HCFC-244 (C3H3F4Cl) Monochlorotetrafluoropropane 0.009-0.14 0.009 - 0.14
HCFC-251 (C3H4FCl3) Monochlorotetrafluoropropane 0.001-0.01 0.001 - 0.01 421-41-0
HCFC-252 (C3H4F2Cl2) Dichlorodifluoropropane 0.005-0.04 0.005 - 0.04 819-00-1
HCFC-253 (C3H4F3Cl) Monochlorotrifluoropropane 0.003-0.03 0.003 - 0.03 460-35-5
HCFC-261 (C3H5FCl2) Dichlorofluoropropane 0.002-0.02 0.002 - 0.02 420-97-3
HCFC-262 (C3H5F2Cl) Monochlorodifluoropropane 0.002-0.02 0.002 - 0.02 421-02-03
HCFC-271 (C3H6FCl) Monochlorofluoropropane 0.001-0.03 0.001 - 0.03 430-55-7

Why are there multiple values given for the ODPs and GWPs?

The numbers in the “ODP1” column are from the Montreal Protocol. Some numbers have been updated as per amendments to the protocol. The “ODP2” column numbers are from the stratospheric ozone protection regulations at 40 CFR Part 82, as required by Title VI of the Clean Air Act amendments. These numbers include the amendments of July 18, 2003 (68 FR 42892). Data in the “ODP3” column come from WMO’sScientific 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 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 Third Assessment Report: Climate Change 2001, and “GWP3” 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 “GWP4” 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 “GWP5” column come from the WMO’sScientific 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


Local Navigation



Jump to main content.