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 Code of Federal Regulations (Last Updated: November 8, 2024)
 Title 40 - Protection of Environment
 Chapter I—Environmental Protection Agency
 SubChapter C—Air Programs
 Part 98 - Mandatory Greenhouse Gas Reporting
 Subpart A - General Provision

  Table A-1 to Subpart A of Part 98 - —Global Warming Potentials  

Latest version.

  • Table A-1 to Subpart A of Part 98—Global Warming Potentials

    Cross Reference
    Link to an amendment published at 89 FR 31894, Apr. 25, 2024.

    [100-Year Time Horizon]

    Name CAS No. Chemical formula Global
    warming
    potential
    (100 yr.)
    Chemical-Specific GWPs
    Carbon dioxide124-38-9CO2 1
    Methane74-82-8CH4 a 25
    Nitrous oxide10024-97-2N2O a 298
    Fully Fluorinated GHGs
    Sulfur hexafluoride2551-62-4SF6 a 22,800
    Trifluoromethyl sulphur pentafluoride373-80-8SF5CF3 17,700
    Nitrogen trifluoride7783-54-2NF3 17,200
    PFC-14 (Perfluoromethane)75-73-0CF4 a 7,390
    PFC-116 (Perfluoroethane)76-16-4C2F6 a 12,200
    PFC-218 (Perfluoropropane)76-19-7C3F8 a 8,830
    Perfluorocyclopropane931-91-9C-C3F6 17,340
    PFC-3-1-10 (Perfluorobutane)355-25-9C4F10 a 8,860
    PFC-318 (Perfluorocyclobutane)115-25-3C-C4F8 a 10,300
    PFC-4-1-12 (Perfluoropentane)678-26-2C5F12 a 9,160
    PFC-5-1-14 (Perfluorohexane, FC-72)355-42-0C6F14 a 9,300
    PFC-6-1-12335-57-9C7F16; CF3(CF2)5CF3 b 7,820
    PFC-7-1-18307-34-6C8F18; CF3(CF2)6CF3 b 7,620
    PFC-9-1-18306-94-5C10F18 7,500
    PFPMIE (HT-70)NACF3OCF(CF3)CF2OCF2OCF3 10,300
    Perfluorodecalin (cis)60433-11-6Z-C10F18 b 7,236
    Perfluorodecalin (trans)60433-12-7E-C10F18 b 6,288
    Saturated Hydrofluorocarbons (HFCs) With Two or Fewer Carbon-Hydrogen Bonds
    HFC-2375-46-7CHF3 a 14,800
    HFC-3275-10-5CH2F2 a 675
    HFC-125354-33-6C2HF5 a 3,500
    HFC-134359-35-3C2H2F4 a 1,100
    HFC-134a811-97-2CH2FCF3 a 1,430
    HFC-227ca2252-84-8CF3CF2CHF2 b 2640
    HFC-227ea431-89-0C3HF7 a 3,220
    HFC-236cb677-56-5CH2FCF2CF3 1,340
    HFC-236ea431-63-0CHF2CHFCF3 1,370
    HFC-236fa690-39-1C3H2F6 a 9,810
    HFC-329p375-17-7CHF2CF2CF2CF3 b 2360
    HFC-43-10mee138495-42-8CF3CFHCFHCF2CF3 a 1,640
    Saturated Hydrofluorocarbons (HFCs) With Three or More Carbon-Hydrogen Bonds
    HFC-41593-53-3CH3F a 92
    HFC-143430-66-0C2H3F3 a 353
    HFC-143a420-46-2C2H3F3 a 4,470
    HFC-152624-72-6CH2FCH2F53
    HFC-152a75-37-6CH3CHF2 a 124
    HFC-161353-36-6CH3CH2F12
    HFC-245ca679-86-7C3H3F5 a 693
    HFC-245cb1814-88-6CF3CF2CH3 b 4620
    HFC-245ea24270-66-4CHF2CHFCHF2 b 235
    HFC-245eb431-31-2CH2FCHFCF3 b 290
    HFC-245fa460-73-1CHF2CH2CF3 1,030
    HFC-263fb421-07-8CH3CH2CF3 b 76
    HFC-272ca420-45-1CH3CF2CH3 b 144
    HFC-365mfc406-58-6CH3CF2CH2CF3 794
    Saturated Hydrofluoroethers (HFEs) and Hydrochlorofluoroethers (HCFEs) With One Carbon-Hydrogen Bond
    HFE-1253822-68-2CHF2OCF3 14,900
    HFE-227ea2356-62-9CF3CHFOCF3 1,540
    HFE-329mcc2134769-21-4CF3CF2OCF2CHF2 919
    HFE-329me3428454-68-6CF3CFHCF2OCF3 b 4,550
    1,1,1,2,2,3,3-Heptafluoro-3-(1,2,2,2-tetrafluoroethoxy)-propane3330-15-2CF3CF2CF2OCHFCF3 b 6,490
    Saturated HFEs and HCFEs With Two Carbon-Hydrogen Bonds
    HFE-134 (HG-00)1691-17-4CHF2OCHF2 6,320
    HFE-236ca32778-11-3CHF2OCF2CHF2 b 4,240
    HFE-236ca12 (HG-10)78522-47-1CHF2OCF2OCHF2 2,800
    HFE-236ea2 (Desflurane)57041-67-5CHF2OCHFCF3 989
    HFE-236fa20193-67-3CF3CH2OCF3 487
    HFE-338mcf2156053-88-2CF3CF2OCH2CF3 552
    HFE-338mmz126103-08-2CHF2OCH(CF3)2 380
    HFE-338pcc13 (HG-01)188690-78-0CHF2OCF2CF2OCHF2 1,500
    HFE-43-10pccc (H-Galden 1040x, HG-11)E1730133CHF2OCF2OC2F4OCHF2 1,870
    HCFE-235ca2 (Enflurane)13838-16-9CHF2OCF2CHFCl b 583
    HCFE-235da2 (Isoflurane)26675-46-7CHF2OCHClCF3 350
    HG-02205367-61-9HF2C-(OCF2CF2)2-OCF2H b 3,825
    HG-03173350-37-3HF2C-(OCF2CF2)3-OCF2H b 3,670
    HG-20249932-25-0HF2C-(OCF2)2-OCF2H b 5,300
    HG-21249932-26-1HF2C-OCF2CF2OCF2OCF2O-CF2H b 3,890
    HG-30188690-77-9HF2C-(OCF2)3-OCF2H b 7,330
    1,1,3,3,4,4,6,6,7,7,9,9,10,10,12,12,13,13,15,15-eicosafluoro-2,5,8,11,14-Pentaoxapentadecane173350-38-4HCF2O(CF2CF2O)4CF2H b 3,630
    1,1,2-Trifluoro-2-(trifluoromethoxy)-ethane84011-06-3CHF2CHFOCF3 b 1,240
    Trifluoro(fluoromethoxy)methane2261-01-0CH2FOCF3 b 751
    Saturated HFEs and HCFEs With Three or More Carbon-Hydrogen Bonds
    HFE-143a421-14-7CH3OCF3 756
    HFE-245cb222410-44-2CH3OCF2CF3 708
    HFE-245fa184011-15-4CHF2CH2OCF3 286
    HFE-245fa21885-48-9CHF2OCH2CF3 659
    HFE-254cb2425-88-7CH3OCF2CHF2 359
    HFE-263fb2460-43-5CF3CH2OCH3 11
    HFE-263m1; R-E-143a690-22-2CF3OCH2CH3 b 29
    HFE-347mcc3 (HFE-7000)375-03-1CH3OCF2CF2CF3 575
    HFE-347mcf2171182-95-9CF3CF2OCH2CHF2 374
    HFE-347mmy122052-84-2CH3OCF(CF3)2 343
    HFE-347mmz1 (Sevoflurane)28523-86-6(CF3)2CHOCH2F c 216
    HFE-347pcf2406-78-0CHF2CF2OCH2CF3 580
    HFE-356mec3382-34-3CH3OCF2CHFCF3 101
    HFE-356mff2333-36-8CF3CH2OCH2CF3 b 17
    HFE-356mmz113171-18-1(CF3)2CHOCH3 27
    HFE-356pcc3160620-20-2CH3OCF2CF2CHF2 110
    HFE-356pcf250807-77-7CHF2CH2OCF2CHF2 265
    HFE-356pcf335042-99-0CHF2OCH2CF2CHF2 502
    HFE-365mcf222052-81-9CF3CF2OCH2CH3 b 58
    HFE-365mcf3378-16-5CF3CF2CH2OCH3 11
    HFE-374pc2512-51-6CH3CH2OCF2CHF2 557
    HFE-449s1 (HFE-7100) Chemical blend163702-07-6C4F9OCH3 297
    163702-08-7(CF3)2CFCF2OCH3
    HFE-569sf2 (HFE-7200) Chemical blend163702-05-4C4F9OC2H5 59
    163702-06-5(CF3)2CFCF2OC2H5
    HG'-0173287-23-7CH3OCF2CF2OCH3 b 222
    HG'-02485399-46-0CH3O(CF2CF2O)2CH3 b 236
    HG'-03485399-48-2CH3O(CF2CF2O)3CH3 b 221
    Difluoro(methoxy)methane359-15-9CH3OCHF2 b 144
    2-Chloro-1,1,2-trifluoro-1-methoxyethane425-87-6CH3OCF2CHFCl b 122
    1-Ethoxy-1,1,2,2,3,3,3-heptafluoropropane22052-86-4CF3CF2CF2OCH2CH3 b 61
    2-Ethoxy-3,3,4,4,5-pentafluorotetrahydro-2,5-bis[1,2,2,2-tetrafluoro-1-(trifluoromethyl)ethyl]-furan920979-28-8C12H5F19O2 b 56
    1-Ethoxy-1,1,2,3,3,3-hexafluoropropane380-34-7CF3CHFCF2OCH2CH3 b 23
    Fluoro(methoxy)methane460-22-0CH3OCH2F b 13
    1,1,2,2-Tetrafluoro-3-methoxy-propane; Methyl 2,2,3,3-tetrafluoropropyl ether60598-17-6CHF2CF2CH2OCH3 b 0.5
    1,1,2,2-Tetrafluoro-1-(fluoromethoxy)ethane37031-31-5CH2FOCF2CF2H b 871
    Difluoro(fluoromethoxy)methane461-63-2CH2FOCHF2 b 617
    Fluoro(fluoromethoxy)methane462-51-1CH2FOCH2F b 130
    Fluorinated Formates
    Trifluoromethyl formate85358-65-2HCOOCF3 b 588
    Perfluoroethyl formate313064-40-3HCOOCF2CF3 b 580
    1,2,2,2-Tetrafluoroethyl formate481631-19-0HCOOCHFCF3 b 470
    Perfluorobutyl formate197218-56-7HCOOCF2CF2CF2CF3 b 392
    Perfluoropropyl formate271257-42-2HCOOCF2CF2CF3 b 376
    1,1,1,3,3,3-Hexafluoropropan-2-yl formate856766-70-6HCOOCH(CF3)2 b 333
    2,2,2-Trifluoroethyl formate32042-38-9HCOOCH2CF3 b 33
    3,3,3-Trifluoropropyl formate1344118-09-7HCOOCH2CH2CF3 b 17
    Fluorinated Acetates
    Methyl 2,2,2-trifluoroacetate431-47-0CF3COOCH3 b 52
    1,1-Difluoroethyl 2,2,2-trifluoroacetate1344118-13-3CF3COOCF2CH3 b 31
    Difluoromethyl 2,2,2-trifluoroacetate2024-86-4CF3COOCHF2 b 27
    2,2,2-Trifluoroethyl 2,2,2-trifluoroacetate407-38-5CF3COOCH2CF3 b 7
    Methyl 2,2-difluoroacetate433-53-4HCF2COOCH3 b 3
    Perfluoroethyl acetate343269-97-6CH3COOCF2CF3 b 2.1
    Trifluoromethyl acetate74123-20-9CH3COOCF3 b 2.0
    Perfluoropropyl acetate1344118-10-0CH3COOCF2CF2CF3 b 1.8
    Perfluorobutyl acetate209597-28-4CH3COOCF2CF2CF2CF3 b 1.6
    Ethyl 2,2,2-trifluoroacetate383-63-1CF3COOCH2CH3 b 1.3
    Carbonofluoridates
    Methyl carbonofluoridate1538-06-3FCOOCH3 b 95
    1,1-Difluoroethyl carbonofluoridate1344118-11-1FCOOCF2CH3 b 27
    Fluorinated Alcohols Other Than Fluorotelomer Alcohols
    Bis(trifluoromethyl)-methanol920-66-1(CF3)2CHOH195
    (Octafluorotetramethy-lene) hydroxymethyl groupNAX-(CF2)4CH(OH)-X73
    2,2,3,3,3-Pentafluoropropanol422-05-9CF3CF2CH2OH42
    2,2,3,3,4,4,4-Heptafluorobutan-1-ol375-01-9C3F7CH2OH b 25
    2,2,2-Trifluoroethanol75-89-8CF3CH2OH b 20
    2,2,3,4,4,4-Hexafluoro-1-butanol382-31-0CF3CHFCF2CH2OH b 17
    2,2,3,3-Tetrafluoro-1-propanol76-37-9CHF2CF2CH2OH b 13
    2,2-Difluoroethanol359-13-7CHF2CH2OH b 3
    2-Fluoroethanol371-62-0CH2FCH2OH b 1.1
    4,4,4-Trifluorobutan-1-ol461-18-7CF3(CH2)2CH2OH b 0.05
    Unsaturated Perfluorocarbons (PFCs)
    PFC-1114; TFE116-14-3CF2 = CF2; C2F4 b 0.004
    PFC-1216; Dyneon HFP116-15-4C3F6; CF3CF = CF2 b 0.05
    PFC C-1418559-40-0c-C5F8 b 1.97
    Perfluorobut-2-ene360-89-4CF3CF = CFCF3 b 1.82
    Perfluorobut-1-ene357-26-6CF3CF2CF = CF2 b 0.10
    Perfluorobuta-1,3-diene685-63-2CF2 = CFCF = CF2 b 0.003
    Unsaturated Hydrofluorocarbons (HFCs) and Hydrochlorofluorocarbons (HCFCs)
    HFC-1132a; VF275-38-7C2H2F2 , CF2 = CH2 b 0.04
    HFC-1141; VF75-02-5C2H3F, CH2 = CHF b 0.02
    (E)-HFC-1225ye5595-10-8CF3CF = CHF(E) b 0.06
    (Z)-HFC-1225ye5528-43-8CF3CF = CHF(Z) b 0.22
    Solstice 1233zd(E)102687-65-0C3H2ClF3; CHCl = CHCF3 b 1.34
    HFC-1234yf; HFO-1234yf754-12-1C3H2F4; CF3CF = CH2 b 0.31
    HFC-1234ze(E)1645-83-6C3H2F4; trans-CF3CH = CHF b 0.97
    HFC-1234ze(Z)29118-25-0C3H2F4; cis-CF3CH = CHF; CF3CH = CHF b 0.29
    HFC-1243zf; TFP677-21-4C3H3F3, CF3CH = CH2 b 0.12
    (Z)-HFC-1336692-49-9CF3CH = CHCF3(Z) b 1.58
    HFC-1345zfc374-27-6C2F5CH = CH2 b 0.09
    Capstone 42-U19430-93-4C6H3F9, CF3(CF2)3CH = CH2 b 0.16
    Capstone 62-U25291-17-2C8H3F13, CF3(CF2)5CH = CH2 b 0.11
    Capstone 82-U21652-58-4C10H3F17, CF3(CF2)7CH = CH2 b 0.09
    Unsaturated Halogenated Ethers
    PMVE; HFE-2161187-93-5CF3OCF = CF2 b 0.17
    Fluoroxene406-90-6CF3CH2OCH = CH2 b 0.05
    Fluorinated Aldehydes
    3,3,3-Trifluoro-propanal460-40-2CF3CH2CHO b 0.01
    Fluorinated Ketones
    Novec 1230 (perfluoro (2-methyl-3-pentanone))756-13-8CF3CF2C(O)CF (CF3)2 b 0.1
    Fluorotelomer Alcohols
    3,3,4,4,5,5,6,6,7,7,7-Undecafluoroheptan-1-ol185689-57-0CF3(CF2)4CH2CH2OH b 0.43
    3,3,3-Trifluoropropan-1-ol2240-88-2CF3CH2CH2OH b 0.35
    3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-Pentadecafluorononan-1-ol755-02-2CF3(CF2)6CH2CH2OH b 0.33
    3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,11-Nonadecafluoroundecan-1-ol87017-97-8CF3(CF2)8CH2CH2OH b 0.19
    Fluorinated GHGs With Carbon-Iodine Bond(s)
    Trifluoroiodomethane2314-97-8CF3I b 0.4
    Other Fluorinated Compounds
    Dibromodifluoromethane (Halon 1202)75-61-6CBR2F2 b 231
    2-Bromo-2-chloro-1,1,1-trifluoroethane (Halon-2311/Halothane)151-67-7CHBrClCF3 b 41
    Fluorinated GHG Groupd Global
    warming
    potential
    (100 yr.)
    Default GWPs for Compounds for Which Chemical-Specific GWPs Are Not Listed Above
    Fully fluorinated GHGs10,000
    Saturated hydrofluorocarbons (HFCs) with 2 or fewer carbon-hydrogen bonds3,700
    Saturated HFCs with 3 or more carbon-hydrogen bonds930
    Saturated hydrofluoroethers (HFEs) and hydrochlorofluoroethers (HCFEs) with 1 carbon-hydrogen bond5,700
    Saturated HFEs and HCFEs with 2 carbon-hydrogen bonds2,600
    Saturated HFEs and HCFEs with 3 or more carbon-hydrogen bonds270
    Fluorinated formates350
    Fluorinated acetates, carbonofluoridates, and fluorinated alcohols other than fluorotelomer alcohols30
    Unsaturated perfluorocarbons (PFCs), unsaturated HFCs, unsaturated hydrochlorofluorocarbons (HCFCs), unsaturated halogenated ethers, unsaturated halogenated esters, fluorinated aldehydes, and fluorinated ketones1
    Fluorotelomer alcohols1
    Fluorinated GHGs with carbon-iodine bond(s)1
    Other fluorinated GHGs2,000

    a The GWP for this compound was updated in the final rule published on November 29, 2013 [78 FR 71904] and effective on January 1, 2014.

    b This compound was added to Table A-1 in the final rule published on December 11, 2014, and effective on January 1, 2015.

    c The GWP for this compound was updated in the final rule published on December 11, 2014, and effective on January 1, 2015 .

    d For electronics manufacturing (as defined in § 98.90), the term “fluorinated GHGs” in the definition of each fluorinated GHG group in § 98.6 shall include fluorinated heat transfer fluids (as defined in § 98.98), whether or not they are also fluorinated GHGs.

    [79 FR 73779, Dec. 11, 2014]