40 CFR Appendix Table A-1 to Subpart A of Part 98 - Global Warming Potentials, 100-Year Time Horizon

Table A-1 to Subpart A of Part 98—Global Warming Potentials, 100-Year Time Horizon

Table A-1 to Subpart A of Part 98—Global Warming Potentials, 100-Year Time Horizon

Name CAS No. Chemical formula Global
warming
potential
(100 yr.)
Chemical-Specific GWPs
Carbon dioxide 124-38-9 CO2 1
Methane 74-82-8 CH4 ad 28
Nitrous oxide 10024-97-2 N2O ad 265
Fully Fluorinated GHGs
Sulfur hexafluoride 2551-62-4 SF6 ad 23,500
Trifluoromethyl sulphur pentafluoride 373-80-8 SF5CF3 d 17,400
Nitrogen trifluoride 7783-54-2 NF3 d 16,100
PFC-14 (Perfluoromethane) 75-73-0 CF4 ad 6,630
PFC-116 (Perfluoroethane) 76-16-4 C2F6 ad 11,100
PFC-218 (Perfluoropropane) 76-19-7 C3F8 ad 8,900
Perfluorocyclopropane 931-91-9 c-C3F6 d 9,200
PFC-3-1-10 (Perfluorobutane) 355-25-9 C4F10 ad 9,200
PFC-318 (Perfluorocyclobutane) 115-25-3 c-C4F8 ad 9,540
Perfluorotetrahydrofuran 773-14-8 c-C4F8O e 13,900
PFC-4-1-12 (Perfluoropentane) 678-26-2 C5F12 ad 8,550
PFC-5-1-14 (Perfluorohexane, FC-72) 355-42-0 C6F14 ad 7,910
PFC-6-1-12 335-57-9 C7F16; CF3(CF2)5CF3 b 7,820
PFC-7-1-18 307-34-6 C8F18; CF3(CF2)6CF3 b 7,620
PFC-9-1-18 306-94-5 C10F18 d 7,190
PFPMIE (HT-70) NA CF3OCF(CF3)CF2OCF2OCF3 d 9,710
Perfluorodecalin (cis) 60433-11-6 Z-C10F18 bd 7,240
Perfluorodecalin (trans) 60433-12-7 E-C10F18 bd 6,290
Perfluorotriethylamine 359-70-6 N(C2F5)3 e 10,300
Perfluorotripropylamine 338-83-0 N(CF2CF2CF3)3 e 9,030
Perfluorotributylamine 311-89-7 N(CF2CF2CF2CF3)3 e 8,490
Perfluorotripentylamine 338-84-1 N(CF2CF2CF2CF2CF3)3 e 7,260
Saturated Hydrofluorocarbons (HFCs) With Two or Fewer Carbon-Hydrogen Bonds
(4s,5s)-1,1,2,2,3,3,4,5-octafluorocyclopentane 158389-18-5 trans-cyc (-CF2CF2CF2CHFCHF-) e 258
HFC-23 75-46-7 CHF3 ad 12,400
HFC-32 75-10-5 CH2F2 ad 677
HFC-125 354-33-6 C2HF5 ad 3,170
HFC-134 359-35-3 C2H2F4 ad 1,120
HFC-134a 811-97-2 CH2FCF3 ad 1,300
HFC-227ca 2252-84-8 CF3CF2CHF2 b 2,640
HFC-227ea 431-89-0 C3HF7 ad 3,350
HFC-236cb 677-56-5 CH2FCF2CF3 d 1,210
HFC-236ea 431-63-0 CHF2CHFCF3 d 1,330
HFC-236fa 690-39-1 C3H2F6 ad 8,060
HFC-329p 375-17-7 CHF2CF2CF2CF3 b 2360
HFC-43-10mee 138495-42-8 CF3CFHCFHCF2CF3 ad 1,650
Saturated Hydrofluorocarbons (HFCs) With Three or More Carbon-Hydrogen Bonds
1,1,2,2,3,3-hexafluorocyclopentane 123768-18-3 cyc (-CF2CF2CF2CH2CH2-) e 120
1,1,2,2,3,3,4-heptafluorocyclopentane 15290-77-4 cyc (-CF2CF2CF2CHFCH2-) e 231
HFC-41 593-53-3 CH3F ad 116
HFC-143 430-66-0 C2H3F3 ad 328
HFC-143a 420-46-2 C2H3F3 ad 4,800
HFC-152 624-72-6 CH2FCH2F d 16
HFC-152a 75-37-6 CH3CHF2 ad 138
HFC-161 353-36-6 CH3CH2F d 4
HFC-245ca 679-86-7 C3H3F5 ad 716
HFC-245cb 1814-88-6 CF3CF2CH3 b 4,620
HFC-245ea 24270-66-4 CHF2CHFCHF2 b 235
HFC-245eb 431-31-2 CH2FCHFCF3 b 290
HFC-245fa 460-73-1 CHF2CH2CF3 d 858
HFC-263fb 421-07-8 CH3CH2CF3 b 76
HFC-272ca 420-45-1 CH3CF2CH3 b 144
HFC-365mfc 406-58-6 CH3CF2CH2CF3 d 804
Saturated Hydrofluoroethers (HFEs) and Hydrochlorofluoroethers (HCFEs) With One Carbon-Hydrogen Bond
HFE-125 3822-68-2 CHF2OCF3 d 12,400
HFE-227ea 2356-62-9 CF3CHFOCF3 d 6,450
HFE-329mcc2 134769-21-4 CF3CF2OCF2CHF2 d 3,070
HFE-329me3 428454-68-6 CF3CFHCF2OCF3 b 4,550
1,1,1,2,2,3,3-Heptafluoro-3-(1,2,2,2-tetrafluoroethoxy)-propane 3330-15-2 CF3CF2CF2OCHFCF3 b 6,490
Saturated HFEs and HCFEs With Two Carbon-Hydrogen Bonds
HFE-134 (HG-00) 1691-17-4 CHF2OCHF2 d 5,560
HFE-236ca 32778-11-3 CHF2OCF2CHF2 b 4,240
HFE-236ca12 (HG-10) 78522-47-1 CHF2OCF2OCHF2 d 5,350
HFE-236ea2 (Desflurane) 57041-67-5 CHF2OCHFCF3 d 1,790
HFE-236fa 20193-67-3 CF3CH2OCF3 d 979
HFE-338mcf2 156053-88-2 CF3CF2OCH2CF3 d 929
HFE-338mmz1 26103-08-2 CHF2OCH(CF3)2 d 2,620
HFE-338pcc13 (HG-01) 188690-78-0 CHF2OCF2CF2OCHF2 d 2,910
HFE-43-10pccc (H-Galden 1040x, HG-11) E1730133 CHF2OCF2OC2F4OCHF2 d 2,820
HCFE-235ca2 (Enflurane) 13838-16-9 CHF2OCF2CHFCl b 583
HCFE-235da2 (Isoflurane) 26675-46-7 CHF2OCHClCF3 d 491
HG-02 205367-61-9 HF2C-(OCF2CF2)2-OCF2H bd 2,730
HG-03 173350-37-3 HF2C-(OCF2CF2)3-OCF2H bd 2,850
HG-20 249932-25-0 HF2C-(OCF2)2-OCF2H b 5,300
HG-21 249932-26-1 HF2C-OCF2CF2OCF2OCF2O-CF2H b 3,890
HG-30 188690-77-9 HF2C-(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-Pentaoxapentadecane 173350-38-4 HCF2O(CF2CF2O)4CF2H b 3,630
1,1,2-Trifluoro-2-(trifluoromethoxy)-ethane 84011-06-3 CHF2CHFOCF3 b 1,240
Trifluoro(fluoromethoxy)methane 2261-01-0 CH2FOCF3 b 751
Saturated HFEs and HCFEs With Three or More Carbon-Hydrogen Bonds
HFE-143a 421-14-7 CH3OCF3 d 523
HFE-245cb2 22410-44-2 CH3OCF2CF3 d 654
HFE-245fa1 84011-15-4 CHF2CH2OCF3 d 828
HFE-245fa2 1885-48-9 CHF2OCH2CF3 d 812
HFE-254cb1 425-88-7 CH3OCF2CHF2 d 301
HFE-263fb2 460-43-5 CF3CH2OCH3 d 1
HFE-263m1; R-E-143a 690-22-2 CF3OCH2CH3 b 29
HFE-347mcc3 (HFE-7000) 375-03-1 CH3OCF2CF2CF3 d 530
HFE-347mcf2 171182-95-9 CF3CF2OCH2CHF2 d 854
HFE-347mmy1 22052-84-2 CH3OCF(CF3)2 d 363
HFE-347mmz1 (Sevoflurane) 28523-86-6 (CF3)2CHOCH2F c 216
HFE-347pcf2 406-78-0 CHF2CF2OCH2CF3 d 889
HFE-356mec3 382-34-3 CH3OCF2CHFCF3 d 387
HFE-356mff2 333-36-8 CF3CH2OCH2CF3 b 17
HFE-356mmz1 13171-18-1 (CF3)2CHOCH3 d 14
HFE-356pcc3 160620-20-2 CH3OCF2CF2CHF2 d 413
HFE-356pcf2 50807-77-7 CHF2CH2OCF2CHF2 d 719
HFE-356pcf3 35042-99-0 CHF2OCH2CF2CHF2 d 446
HFE-365mcf2 22052-81-9 CF3CF2OCH2CH3 b 58
HFE-365mcf3 378-16-5 CF3CF2CH2OCH3 d 0.99
HFE-374pc2 512-51-6 CH3CH2OCF2CHF2 d 627
HFE-449s1 (HFE-7100) Chemical blend 163702-07-6 C4F9OCH3 d 421
163702-08-7 (CF3)2CFCF2OCH3
HFE-569sf2 (HFE-7200) Chemical blend 163702-05-4 C4F9OC2H5 d 57
163702-06-5 (CF3)2CFCF2OC2H5
HFE-7300 132182-92-4 (CF3)2CFCFOC2H5CF2CF2CF3 e 405
HFE-7500 297730-93-9 n-C3F7CFOC2H5CF(CF3)2 e 13
HG′-01 73287-23-7 CH3OCF2CF2OCH3 b 222
HG′-02 485399-46-0 CH3O(CF2CF2O)2CH3 b 236
HG′-03 485399-48-2 CH3O(CF2CF2O)3CH3 b 221
Difluoro(methoxy)methane 359-15-9 CH3OCHF2 b 144
2-Chloro-1,1,2-trifluoro-1-methoxyethane 425-87-6 CH3OCF2CHFCl b 122
1-Ethoxy-1,1,2,2,3,3,3-heptafluoropropane 22052-86-4 CF3CF2CF2OCH2CH3 b 61
2-Ethoxy-3,3,4,4,5-pentafluorotetrahydro-2,5-bis[1,2,2,2-tetrafluoro-1-(trifluoromethyl)ethyl]-furan 920979-28-8 C12H5F19O2 b 56
1-Ethoxy-1,1,2,3,3,3-hexafluoropropane 380-34-7 CF3CHFCF2OCH2CH3 b 23
Fluoro(methoxy)methane 460-22-0 CH3OCH2F b 13
1,1,2,2-Tetrafluoro-3-methoxy-propane; Methyl 2,2,3,3-tetrafluoropropyl ether 60598-17-6 CHF2CF2CH2OCH3 bd 0.49
1,1,2,2-Tetrafluoro-1-(fluoromethoxy)ethane 37031-31-5 CH2FOCF2CF2H b 871
Difluoro(fluoromethoxy)methane 461-63-2 CH2FOCHF2 b 617
Fluoro(fluoromethoxy)methane 462-51-1 CH2FOCH2F b 130
Saturated Chlorofluorocarbons (CFCs)
E-R316c 3832-15-3 trans-cyc (-CClFCF2CF2CClF-) e 4,230
Z-R316c 3934-26-7 cis-cyc (-CClFCF2CF2CClF-) e 5,660
Fluorinated Formates
Trifluoromethyl formate 85358-65-2 HCOOCF3 b 588
Perfluoroethyl formate 313064-40-3 HCOOCF2CF3 b 580
1,2,2,2-Tetrafluoroethyl formate 481631-19-0 HCOOCHFCF3 b 470
Perfluorobutyl formate 197218-56-7 HCOOCF2CF2CF2CF3 b 392
Perfluoropropyl formate 271257-42-2 HCOOCF2CF2CF3 b 376
1,1,1,3,3,3-Hexafluoropropan-2-yl formate 856766-70-6 HCOOCH(CF3)2 b 333
2,2,2-Trifluoroethyl formate 32042-38-9 HCOOCH2CF3 b 33
3,3,3-Trifluoropropyl formate 1344118-09-7 HCOOCH2CH2CF3 b 17
Fluorinated Acetates
Methyl 2,2,2-trifluoroacetate 431-47-0 CF3COOCH3 b 52
1,1-Difluoroethyl 2,2,2-trifluoroacetate 1344118-13-3 CF3COOCF2CH3 b 31
Difluoromethyl 2,2,2-trifluoroacetate 2024-86-4 CF3COOCHF2 b 27
2,2,2-Trifluoroethyl 2,2,2-trifluoroacetate 407-38-5 CF3COOCH2CF3 b 7
Methyl 2,2-difluoroacetate 433-53-4 HCF2COOCH3 b 3
Perfluoroethyl acetate 343269-97-6 CH3COOCF2CF3 bd 2
Trifluoromethyl acetate 74123-20-9 CH3COOCF3 bd 2
Perfluoropropyl acetate 1344118-10-0 CH3COOCF2CF2CF3 bd 2
Perfluorobutyl acetate 209597-28-4 CH3COOCF2CF2CF2CF3 bd 2
Ethyl 2,2,2-trifluoroacetate 383-63-1 CF3COOCH2CH3 bd 1
Carbonofluoridates
Methyl carbonofluoridate 1538-06-3 FCOOCH3 b 95
1,1-Difluoroethyl carbonofluoridate 1344118-11-1 FCOOCF2CH3 b 27
Fluorinated Alcohols Other Than Fluorotelomer Alcohols
Bis(trifluoromethyl)-methanol 920-66-1 (CF3)2CHOH d 182
2,2,3,3,4,4,5,5-Octafluorocyclopentanol 16621-87-7 cyc (-(CF2)4CH(OH)-) d 13
2,2,3,3,3-Pentafluoropropanol 422-05-9 CF3CF2CH2OH d 19
2,2,3,3,4,4,4-Heptafluorobutan-1-ol 375-01-9 C3F7CH2OH bd 34
2,2,2-Trifluoroethanol 75-89-8 CF3CH2OH b 20
2,2,3,4,4,4-Hexafluoro-1-butanol 382-31-0 CF3CHFCF2CH2OH b 17
2,2,3,3-Tetrafluoro-1-propanol 76-37-9 CHF2CF2CH2OH b 13
2,2-Difluoroethanol 359-13-7 CHF2CH2OH b 3
2-Fluoroethanol 371-62-0 CH2FCH2OH b 1.1
4,4,4-Trifluorobutan-1-ol 461-18-7 CF3(CH2)2CH2OH b 0.05
Non-Cyclic, Unsaturated Perfluorocarbons (PFCs)
PFC-1114; TFE 116-14-3 CF2 = CF2; C2F4 b 0.004
PFC-1216; Dyneon HFP 116-15-4 C3F6; CF3CF = CF2 b 0.05
Perfluorobut-2-ene 360-89-4 CF3CF = CFCF3 b 1.82
Perfluorobut-1-ene 357-26-6 CF3CF2CF = CF2 b 0.10
Perfluorobuta-1,3-diene 685-63-2 CF2 = CFCF = CF2 b 0.003
Non-Cyclic, Unsaturated Hydrofluorocarbons (HFCs) and Hydrochlorofluorocarbons (HCFCs)
HFC-1132a; VF2 75-38-7 C2H2F2, CF2 = CH2 b 0.04
HFC-1141; VF 75-02-5 C2H3F, CH2 = CHF b 0.02
(E)-HFC-1225ye 5595-10-8 CF3CF = CHF(E) b 0.06
(Z)-HFC-1225ye 5528-43-8 CF3CF = CHF(Z) b 0.22
Solstice 1233zd(E) 102687-65-0 C3H2ClF3; CHCl = CHCF3 b 1.34
HCFO-1233zd(Z) 99728-16-2 (Z)-CF3CH = CHCl e 0.45
HFC-1234yf; HFO-1234yf 754-12-1 C3H2F4; CF3CF = CH2 b 0.31
HFC-1234ze(E) 1645-83-6 C3H2F4; trans-CF3CH = CHF b 0.97
HFC-1234ze(Z) 29118-25-0 C3H2F4; cis-CF3CH = CHF; CF3CH = CHF b 0.29
HFC-1243zf; TFP 677-21-4 C3H3F3, CF3CH = CH2 b 0.12
(Z)-HFC-1336 692-49-9 CF3CH = CHCF3(Z) b 1.58
HFO-1336mzz(E) 66711-86-2 (E)-CF3CH = CHCF3 e 18
HFC-1345zfc 374-27-6 C2F5CH = CH2 b 0.09
HFO-1123 359-11-5 CHF=CF2 e 0.005
HFO-1438ezy(E) 14149-41-8 (E)-(CF3)2CFCH = CHF e 8.2
HFO-1447fz 355-08-8 CF3(CF2)2CH = CH2 e 0.24
Capstone 42-U 19430-93-4 C6H3F9, CF3(CF2)3CH = CH2 b 0.16
Capstone 62-U 25291-17-2 C8H3F13, CF3(CF2)5CH = CH2 b 0.11
Capstone 82-U 21652-58-4 C10H3F17, CF3(CF2)7CH = CH2 b 0.09
(e)-1-chloro-2-fluoroethene 460-16-2 (E)-CHCl = CHF e 0.004
3,3,3-trifluoro-2-(trifluoromethyl)prop-1-ene 382-10-5 (CF3)2C = CH2 e 0.38
Non-Cyclic, Unsaturated CFCs
CFC-1112 598-88-9 CClF=CClF e 0.13
CFC-1112a 79-35-6 CCl2=CF2 e 0.021
Non-Cyclic, Unsaturated Halogenated Ethers
PMVE; HFE-216 1187-93-5 CF3OCF = CF2 b 0.17
Fluoroxene 406-90-6 CF3CH2OCH = CH2 b 0.05
Methyl-perfluoroheptene-ethers N/A CH3OC7F13 e 15
Non-Cyclic, Unsaturated Halogenated Esters
Ethenyl 2,2,2-trifluoroacetate 433-28-3 CF3COOCH=CH2 e 0.008
Prop-2-enyl 2,2,2-trifluoroacetate 383-67-5 CF3COOCH2CH=CH2 e 0.007
Cyclic, Unsaturated HFCs and PFCs
PFC C-1418 559-40-0 c-C5F8 d 2
Hexafluorocyclobutene 697-11-0 cyc (-CF=CFCF2CF2-) e 126
1,3,3,4,4,5,5-heptafluorocyclopentene 1892-03-1 cyc (-CF2CF2CF2CF=CH-) e 45
1,3,3,4,4-pentafluorocyclobutene 374-31-2 cyc (-CH=CFCF2CF2-) e 92
3,3,4,4-tetrafluorocyclobutene 2714-38-7 cyc (-CH=CHCF2CF2-) e 26
Fluorinated Aldehydes
3,3,3-Trifluoro-propanal 460-40-2 CF3CH2CHO b 0.01
Fluorinated Ketones
Novec 1230 (perfluoro (2-methyl-3-pentanone)) 756-13-8 CF3CF2C(O)CF (CF3)2 b 0.1
1,1,1-trifluoropropan-2-one 421-50-1 CF3COCH3 e 0.09
1,1,1-trifluorobutan-2-one 381-88-4 CF3COCH2CH3 e 0.095
Fluorotelomer Alcohols
3,3,4,4,5,5,6,6,7,7,7-Undecafluoroheptan-1-ol 185689-57-0 CF3(CF2)4CH2CH2OH b 0.43
3,3,3-Trifluoropropan-1-ol 2240-88-2 CF3CH2CH2OH b 0.35
3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-Pentadecafluorononan-1-ol 755-02-2 CF3(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-ol 87017-97-8 CF3(CF2)8CH2CH2OH b 0.19
Fluorinated GHGs With Carbon-Iodine Bond(s)
Trifluoroiodomethane 2314-97-8 CF3I b 0.4
Remaining Fluorinated GHGs with Chemical-Specific GWPs
Dibromodifluoromethane (Halon 1202) 75-61-6 CBr2F2 b 231
2-Bromo-2-chloro-1,1,1-trifluoroethane (Halon-2311/Halothane) 151-67-7 CHBrClCF3 b 41
Heptafluoroisobutyronitrile 42532-60-5 (CF3)2CFCN e 2,750
Carbonyl fluoride 353-50-4 COF2 e 0.14
Fluorinated GHG group f Global warming
potential
(100 yr.)
Default GWPs for Compounds for Which Chemical-Specific GWPs Are Not Listed Above
Fully fluorinated GHGs g 9,200
Saturated hydrofluorocarbons (HFCs) with 2 or fewer carbon-hydrogen bonds g 3,000
Saturated HFCs with 3 or more carbon-hydrogen bonds g 840
Saturated hydrofluoroethers (HFEs) and hydrochlorofluoroethers (HCFEs) with 1 carbon-hydrogen bond g 6,600
Saturated HFEs and HCFEs with 2 carbon-hydrogen bonds g 2,900
Saturated HFEs and HCFEs with 3 or more carbon-hydrogen bonds g 320
Saturated chlorofluorocarbons (CFCs) g 4,900
Fluorinated formates 350
Cyclic forms of the following: unsaturated perfluorocarbons (PFCs), unsaturated HFCs, unsaturated CFCs, unsaturated hydrochlorofluorocarbons (HCFCs), unsaturated bromofluorocarbons (BFCs), unsaturated bromochlorofluorocarbons (BCFCs), unsaturated hydrobromofluorocarbons (HBFCs), unsaturated hydrobromochlorofluorocarbons (HBCFCs), unsaturated halogenated ethers, and unsaturated halogenated esters g 58
Fluorinated acetates, carbonofluoridates, and fluorinated alcohols other than fluorotelomer alcohols g 25
Fluorinated aldehydes, fluorinated ketones, and non-cyclic forms of the following: unsaturated perfluorocarbons (PFCs), unsaturated HFCs, unsaturated CFCs, unsaturated HCFCs, unsaturated BFCs, unsaturated BCFCs, unsaturated HBFCs, unsaturated HBCFCs, unsaturated halogenated ethers and unsaturated halogenated esters g 1
Fluorotelomer alcohols g 1
Fluorinated GHGs with carbon-iodine bond(s) g 1
Other fluorinated GHGs g 1,800

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 The GWP for this compound was updated in the final rule published on April 25, 2024 and effective on January 1, 2025.

e The GWP for this compound was added to table A-1 in the final rule published on April 25, 2024 and effective on January 1, 2025.

f 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 § 98.6), whether or not they are also fluorinated GHGs.

g The GWP for this fluorinated GHG group was updated in the final rule published on April 25, 2024 and effective on January 1, 2025.

[89 FR 31894, Apr. 25, 2024]