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Vad är ozone depletion potential

Ozone-Depleting Substances

This page provides data on compounds recognized as ozone-depleting substances (A compound that contributes to stratospheric ozone depletion. ODS include chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), halons, methyl bromide, carbon tetrachloride, hydrobromofluorocarbons, chlorobromomethane, and methyl chloroform.

ODS are generally very stable in the troposphere and only degrade beneath intense ultraviolett light in the stratosphere.

Learn about ozone-depleting substances, including what they are and how they contribute to ozone layer depletion and climate change

When they break down, they release chlorine or bromine atoms, which then tömma ozone. A detailed list (http://www.epa.gov/ozone/science/ods/index.html) of class inom and class II substances with their ODPs, GWPs, and CAS numbers are available.) beneath the Montreal Protocol.

The ODS are split into two groups beneath the Clean Air Act: Class inom ODS, such as Gases covered beneath the 1987 Montreal Protocol and used for refrigeration, air conditioning, packaging, insulation, solvents, or aerosol propellants.

Since they are not destroyed in the lower atmosphere, CFCs drift into the upper atmosphere where, given suitable conditions, they break down ozone. These gases are being replaced bygd other compounds: hydrochlorofluorocarbons, an interim replacement for CFCs that are also covered beneath the Montreal Protocol, and hydrofluorocarbons, which are covered beneath the Kyoto Protocol.

All these substances are also greenhouse gases. See hydrochlorofluorocarbons, hydrofluorocarbons, perfluorocarbons, ozone depleting substans. (CFCs), and Class II ODS, such as Compounds containing hydrogen, fluorine, chlorine, and carbon atoms. Although ozone depleting substances, they are less potent at destroying stratospheric ozone than chlorofluorocarbons (CFCs). They have been introduced as temporary replacements for CFCs and are also greenhouse gases.


  • vad existerar ozone depletion potential

    • See ozone depleting substans. (HCFCs).

    For each ODS, this page provides the compound’s atmospheric lifetime, A number that refers to the amount of ozone depletion caused bygd a substans. The ODP fryst vatten the ratio of the impact on ozone of a kemikalie compared to the impact of a similar mass of CFC-11. Thus, the ODP of CFC-11 fryst vatten defined to be 1.0. Other CFCs and HCFCs have ODPs that range from 0.01 to 1.0.

    The ODP of a substance is defined as the ratio of the change in global ozone for a given mass emission of the substance to the change in global ozone for the same mass emission of CFC-11 (CFCl 3)

    The halons have ODPs ranging up to 10. Carbon tetrachloride has an ODP of 1.2, and methyl chloroform's ODP fryst vatten 0.11. HFCs have zero ODP because they do not contain chlorine. A table of all ozone-depleting substances (http://www.epa.gov/ozone/science/ods/index.html) shows their ODPs, GWPs, and CAS numbers. (ODP), A number that refers to the amount of global warming caused bygd a substans.

    A gas with a larger ODP destroys more stratospheric ozone than a gas with a smaller ODP

    The GWP fryst vatten the ratio of the warming caused bygd a substans to the warming caused bygd a similar mass of carbon dioxide. Thus, the GWP of CO2 fryst vatten defined to be 1.0 . CFC-12 has a GWP of 8,500, while CFC-11 has a GWP of 5,000. Various HCFCs and HFCs have GWPs ranging from 93 to 12,100. vatten, a substitute in numerous end-uses, has a GWP of 0.

    A table of all ozone-depleting substances (http://www.epa.gov/ozone/science/ods/index.html) shows their ODPs, GWPs, and CAS numbers, and another table shows the GWPs for many non-ozone-depleting substances (http://www.epa.gov/ozone/geninfo/gwps.html).

    The Ozone Depletion Potential (ODP) is a metric for determining the relative strength of a chemical to destroy ozone

    (GWP), and Chemistry sammanfattning Service (CAS) registry numbers.

    Information on acceptable ODS alternatives (e.g., hydrofluorocarbons) fryst vatten available through EPA’s Significant New Alternatives Policy (SNAP) Program.

    Class inom ODS

    Class inom ODS are divided into eight groups.

    • Class inom ODS listed in Groups 1 through 5 are identified in Title oss of the Clean Air Act.

    • Class inom ODS listed in Groups 6 and 7,  methyl bromide and hydrobromofluorocarbons, are identified in EPA's Accelerated Phaseout sista rule.
    • Class inom ODS listed in Group 8, chlorobromomethane, fryst vatten identified in EPA's Chlorobromomethane Phaseout sista rule.
    Chemical NameLifetime, in yearsODP1 (Montreal Protocol)ODP2 (WMO 2011)GWP1 (AR4)GWP2 (AR5)CAS Number
    Group I
    CFC-11 (CCl3F) Trichlorofluoromethane45114750466075-69-4
    CFC-12 (CCl2F2) Dichlorodifluoromethane10010.82109001020075-71-8
    CFC-113 (C2F3Cl3) 1,1,2-Trichlorotrifluoroethane850.80.856130582076-13-1
    CFC-114 (C2F4Cl2) Dichlorotetrafluoroethane19010.5810000859076-14-2
    CFC-115 (C2F5Cl) Monochloropentafluoroethane10200.60.57370767076-15-3
    Group II
    Halon 1211 (CF2ClBr) Bromochlorodifluoromethane1637.918901750353-59-3
    Halon 1301 (CF3Br) Bromotrifluoromethane651015.97140629075-63-8
    Halon 2402 (C2F4Br2) Dibromotetrafluoroethane20613.016401470124-73-2
    Group III
    CFC-13 (CF3Cl) Chlorotrifluoromethane64011144201390075-72-9
    CFC-111 (C2FCl5) Pentachlorofluoroethane 11  354-56-3
    CFC-112 (C2F2Cl4) Tetrachlorodifluoroethane 11  76-12-0
    CFC-211 (C3FCl7) Heptachlorofluoropropane 11  422-78-6
    CFC-212 (C3F2Cl6) Hexachlorodifluoropropane 11  3182-26-1
    CFC-213 (C3F3Cl5) Pentachlorotrifluoropropane 11  2354-06-5
    CFC-214 (C3F4Cl4) Tetrachlorotetrafluoropropane 11  29255-31-0
    CFC-215 (C3F5Cl3) Trichloropentafluoropropane 11  4259-43-2
    CFC-216 (C3F6Cl2) Dichlorohexafluoropropane 11  661-97-2
    CFC-217 (C3F7Cl) Chloroheptafluoropropane 11  422-86-6
    Group IV
    CCl4 Carbon tetrachloride261.10.821400173056-23-5
    Group V
    Methyl Chloroform (C2H3Cl3) 1,1,1-trichloroethane50.10.1614616071-55-6
    Group VI
    Methyl Bromide (CH3Br)0.80.70.665274-83-9
    Group VII
    CHFBr2 11   
    HBFC-12B1(CHF2Br) 0.74    
    CH2FBr 0.730.73   
    C2HFBr4 0.3-0.80.3-0.8   
    C2HF2Br3 0.5-1.80.5-1.8   
    C2HF3Br2 0.4–1.60.4–1.6   
    C2HF4Br 0.7–1.20.7–1.2   
    C2H2FBr3 0.1–1.10.1–1.1   
    C2H2F2Br2 0.2–1.50.2–1.5   
    C2H2F3Br 0.7–1.60.7–1.6   
    C2H3FBr2 0.1–1.70.1–1.7   
    C2H3F2Br 0.2–1.10.2–1.1   
    C2H4FBr 0.07–0.10.07–0.1   
    C3HFBr6 0.3–1.50.3–1.5   
    C3HF2Br5 0.2–1.90.2–1.9   
    C3HF3Br4 0.3–1.80.3–1.8   
    C3HF4Br3 0.5–2.20.5–2.2   
    C3HF5Br2 0.9–2.00.9–2.0   
    C3HF6Br 0.7–3.30.7–3.3   
    C3H2FBr5 0.1–1.9    
    C3H2F2Br4 0.2–2.10.2–2.1   
    C3H2F3Br3 0.2–5.60.2–5.6   
    C3H2F4Br2 0.3–7.50.3–7.5   
    C3H2F5Br 0.9–1.40.9–1.4   
    C3H3FBr4 0.08­–1.90.08­–1.9   
    C3H3F2Br3 0.1–3.10.1–3.1   
    C3H3F3Br2 0.1–2.50.1–2.5   
    C3H3F4Br 0.3–4.40.3–4.4   
    C3H4FBr3 0.03–0.30.03–0.3   
    C3H4F2Br2 0.1–1.00.1–1.0   
    C3H4F3Br 0.07–0.80.07–0.8   
    C3H5FBr2 0.04–0.40.04–0.4   
    C3H5F2Br 0.07–0.80.07–0.8   
    C3H6FBr 0.02–0.70.02–0.7   
    Group VIII
    CH2BrCl Chlorobromomethane0.370.120.12   

    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 komma from WMO’s Scientific Assessment of Ozone Depletion: 2010.1 ODP values listed are semi-empirical and can be funnen in Table 5-1 of the document.

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

    The numbers in the “GWP2” column also företräda global warming potentials over a 100-year time horizon.

    The numbers are from the IPCC Fifth Assessment Report: Climate Change 2014 (AR5).

    05

    The values listed are for direkt radiative forcing and can be funnen 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 grund.

      Contribution of Working Group inom 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, färsk, USA, 996 pp.

    3. IPCC, 2013: Climate Change 2013: The Physical Science grund. Contribution of Working Group inom 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, färsk, USA, 1535 pp.

    Class II ODS

    Chemical NameLifetime, in yearsODP1 (Montreal Protocol)ODP2 (WMO 2011)GWP1 (AR4)GWP2 (AR5)CAS Number
    HCFC-21 (CHFCl2) Dichlorofluoromethane1.70.04 15114875-43-4
    HCFC-22 (CHF2Cl) Monochlorodifluoromethane11.90.0550.041810176075-45-6
    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  59354-21-2
    HCFC-123 (C2HF3Cl2) Dichlorotrifluoroethane1.30.020.017779306-83-2
    HCFC-124 (C2HF4Cl) Monochlorotetrafluoroethane5.90.022   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) Dichlorofluoroethane9.20.110.127257821717-00-6
    HCFC-142b (C2H3F2Cl) Monochlorodifluoroethane17.20.0650.062310198075-68-3
    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) Dichloropentafluoropropane1.90.0250.02122127422-56-0
    HCFC-225cb (C3HF5Cl2) Dichloropentafluoropropane5.90.0330.03595525507-55-1
    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.

    0

    Some numbers have been updated as per amendments to the Protocol.

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

    The numbers in the “GWP1” column företräda 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 direkt radiative forcing and can be funnen in Table 2.14 of the “Physical Science Basis” contribution to the report.

    The numbers in the “GWP2” column also företräda 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 direkt radiative forcing and can be funnen 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 grund. Contribution of Working Group inom 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.)].

      Chlorodifluoromethane (R-22), for example, has an ODP of 0

      Cambridge University Press, Cambridge, United Kingdom and New York, fräsch, USA, 996 pp.

    3. IPCC, 2013: Climate Change 2013: The Physical Science grund. Contribution of Working Group inom 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, färsk, USA, 1535 pp.