Ozone-Depleting Substances | US EPA

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Class II ODS

Chemical Name Lifetime, in years ODP1 (Montreal Protocol) ODP2 (WMO 2011) GWP1 (AR4) GWP2 (AR5) CAS Number
HCFC-21 (CHFCl2) Dichlorofluoromethane 1.7 0.04 151 148 75-43-4
HCFC-22 (CHF2Cl) Monochlorodifluoromethane 11.9 0.055 0.04 1810 1760 75-45-6
HCFC-31 (CH2FCl) Monochlorofluoromethane 0.02 593-70-4
HCFC-121 (C2HFCl4) Tetrachlorofluoroethane 0.01-0.04 354-14-3
HCFC-122 (C2HF2Cl3) Trichlorodifluoroethane 0.02-0.08 59 354-21-2
HCFC-123 (C2HF3Cl2) Dichlorotrifluoroethane 1.3 0.02 0.01 77 79 306-83-2
HCFC-124 (C2HF4Cl) Monochlorotetrafluoroethane 5.9 0.022 2837-89-0
HCFC-131 (C2H2FCl3) Trichlorofluoroethane 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 9.2 0.11 0.12 725 782 1717-00-6
HCFC-142b (C2H3F2Cl) Monochlorodifluoroethane 17.2 0.065 0.06 2310 1980 75-68-3
HCFC-221 (C3HFCl6) Hexachlorofluoropropane 0.015–0.07 422-26-4
HCFC-222 (C3HF2Cl5) Pentachlorodifluoropropane 0.01–0.09 422-49-1
HCFC-223 (C3HF3Cl4) Tetrachlorotrifluoropropane 0.01–0.08 422-52-6
HCFC-224 (C3HF4Cl3) Trichlorotetrafluoropropane 0.01–0.09 422-54-8
HCFC-225ca (C3HF5Cl2) Dichloropentafluoropropane 1.9 0.025 0.02 122 127 422-56-0
HCFC-225cb (C3HF5Cl2) Dichloropentafluoropropane 5.9 0.033 0.03 595 525 507-55-1
HCFC-226 (C3HF6Cl) Monochlorohexafluoropropane 0.02–0.1 431-87-8
HCFC-231 (C3H2FCl5) Pentachlorofluoropropane 0.05–0.09 421-94-3
HCFC-232 (C3H2F2Cl4) Tetrachlorodifluoropropane 0.008–0.1 460-89-9
HCFC-233 (C3H2F3Cl3) Trichlorotrifluoropropane 0.007–0.23 7125-84-0
HCFC-234 (C3H2F4Cl2) Dichlorotetrafluoropropane 0.01–0.28 425-94-5
HCFC-235 (C3H2F5Cl) Monochloropentafluoropropane 0.03–0.52 460-92-4
HCFC-241 (C3H3FCl4) Tetrachlorofluoropropane 0.004–0.09 666-27-3
HCFC-242 (C3H3F2Cl3) Trichlorodifluoropropane 0.005–0.13 460-63-9
HCFC-243 (C3H3F3Cl2) Dichlorotrifluoropropane 0.007–0.12 460-69-5
HCFC-244 (C3H3F4Cl) Monochlorotetrafluoropropane 0.009–0.14
HCFC-251 (C3H4FCl3) Monochlorotetrafluoropropane 0.001–0.01 421-41-0
HCFC-252 (C3H4F2Cl2) Dichlorodifluoropropane 0.005–0.04 819-00-1
HCFC-253 (C3H4F3Cl) Monochlorotrifluoropropane 0.003–0.03 460-35-5
HCFC-261 (C3H5FCl2) Dichlorofluoropropane 0.002–0.02 420-97-3
HCFC-262 (C3H5F2Cl) Monochlorodifluoropropane 0.002–0.02 421-02-03
HCFC-271 (C3H6FCl) Monochlorofluoropropane 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.

Data in the “ODP2” column come from WMO’s Scientific Assessment of Ozone Depletion: 2010.1 ODP values listed are semi-empirical and can be found in Table 5-1 of the document.

The numbers in the “GWP1” column represent global warming potentials over a 100-year time horizon. The numbers are from the IPCC Fourth Assessment Report: Climate Change 2007 (AR4).2 The values listed are for direct radiative forcing and can be found in Table 2.14 of the “Physical Science Basis” contribution to the report.

The numbers in the “GWP2” column also represent global warming potentials over a 100-year time horizon. The numbers are from the IPCC Fifth Assessment Report: Climate Change 2014 (AR5). The values listed are for direct radiative forcing and can be found in Table 8.A.1 of the “Physical Science Basis: contribution to the report.3

References

  1. WMO (World Meteorological Organization), 2011: Scientific Assessment of Ozone Depletion: 2010. Global Ozone Research and Monitoring Project—Report No. 52, Geneva, Switzerland, 516 pp.
  2. IPCC, 2007: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change [Solomon, S., D. Qin, M. Manning, Z. Chen, M. Marquis, K.B. Averyt, M. Tignor and H.L. Miller (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 996 pp.
  3. IPCC, 2013: Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change [Stocker, T.F., D. Qin, G.-K. Plattner, M. Tignor, S.K. Allen, J. Boschung, A. Nauels, Y. Xia, V. Bex and P.M. Midgley (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 1535 pp.

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