40 CFR Table A-1 to Subpart A of Part 98: 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 a d 28

Nitrous oxide 10024-97-2 N2 O a d 265

Fully Fluorinated GHGs

Sulfur hexafluoride 2551-62-4 SF6 a d 23,500

Trifluoromethyl sulphur pentafluoride 373-80-8 SF5 CF3 d 17,400

Nitrogen trifluoride 7783-54-2 NF3 d 16,100

PFC-14 (Perfluoromethane) 75-73-0 CF4 a d 6,630

PFC-116 (Perfluoroethane) 76-16-4 C2 F6 a d 11,100

PFC-218 (Perfluoropropane) 76-19-7 C3 F8 a d 8,900

Perfluorocyclopropane 931-91-9 c-C3 F6 d 9,200

PFC-3-1-10 (Perfluorobutane) 355-25-9 C4 F10 a d 9,200

PFC-318 (Perfluorocyclobutane) 115-25-3 c-C4 F8 a d 9,540

Perfluorotetrahydrofuran 773-14-8 c-C4 F8 O e 13,900

PFC-4-1-12 (Perfluoropentane) 678-26-2 C5 F12 a d 8,550

PFC-5-1-14 (Perfluorohexane, FC-72) 355-42-0 C6 F14 a d 7,910

PFC-6-1-12 335-57-9 C7 F16; CF3 (CF2)5 CF3 b 7,820

PFC-7-1-18 307-34-6 C8 F18; CF3 (CF2)6 CF3 b 7,620

PFC-9-1-18 306-94-5 C10 F18 d 7,190

PFPMIE (HT-70) NA CF3 OCF(CF3)CF2 OCF2 OCF3 d 9,710

Perfluorodecalin (cis) 60433-11-6 Z-C10 F18 b d 7,240

Perfluorodecalin (trans) 60433-12-7 E-C10 F18 b d 6,290

Perfluorotriethylamine 359-70-6 N(C2 F5)3 e 10,300

Perfluorotripropylamine 338-83-0 N(CF2 CF2 CF3)3 e 9,030

Perfluorotributylamine 311-89-7 N(CF2 CF2 CF2 CF3)3 e 8,490

Perfluorotripentylamine 338-84-1 N(CF2 CF2 CF2 CF2 CF3)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 a d 12,400

HFC-32 75-10-5 CH2 F2 a d 677

HFC-125 354-33-6 C2 HF5 a d 3,170

HFC-134 359-35-3 C2 H2 F4 a d 1,120

HFC-134a 811-97-2 CH2 FCF3 a d 1,300

HFC-227ca 2252-84-8 CF3 CF2 CHF2 b 2,640

HFC-227ea 431-89-0 C3 HF7 a d 3,350

HFC-236cb 677-56-5 CH2 FCF2 CF3 d 1,210

HFC-236ea 431-63-0 CHF2 CHFCF3 d 1,330

HFC-236fa 690-39-1 C3 H2 F6 a d 8,060

HFC-329p 375-17-7 CHF2 CF2 CF2 CF3 b 2360

HFC-43-10mee 138495-42-8 CF3 CFHCFHCF2 CF3 a d 1,650

Saturated Hydrofluorocarbons (HFCs) With Three or More Carbon-Hydrogen Bonds

1,1,2,2,3,3-hexafluorocyclopentane 123768-18-3 cyc (-CF2 CF2 CF2 CH2 CH2-) e 120

1,1,2,2,3,3,4-heptafluorocyclopentane 15290-77-4 cyc (-CF2 CF2 CF2 CHFCH2-) e 231

HFC-41 593-53-3 CH3 F a d 116

HFC-143 430-66-0 C2 H3 F3 a d 328

HFC-143a 420-46-2 C2 H3 F3 a d 4,800

HFC-152 624-72-6 CH2 FCH2 F d 16

HFC-152a 75-37-6 CH3 CHF2 a d 138

HFC-161 353-36-6 CH3 CH2 F d 4

HFC-245ca 679-86-7 C3 H3 F5 a d 716

HFC-245cb 1814-88-6 CF3 CF2 CH3 b 4,620

HFC-245ea 24270-66-4 CHF2 CHFCHF2 b 235

HFC-245eb 431-31-2 CH2 FCHFCF3 b 290

HFC-245fa 460-73-1 CHF2 CH2 CF3 d 858

HFC-263fb 421-07-8 CH3 CH2 CF3 b 76

HFC-272ca 420-45-1 CH3 CF2 CH3 b 144

HFC-365mfc 406-58-6 CH3 CF2 CH2 CF3 d 804

Saturated Hydrofluoroethers (HFEs) and Hydrochlorofluoroethers (HCFEs) With One Carbon-Hydrogen Bond

HFE-125 3822-68-2 CHF2 OCF3 d 12,400

HFE-227ea 2356-62-9 CF3 CHFOCF3 d 6,450

HFE-329mcc2 134769-21-4 CF3 CF2 OCF2 CHF2 d 3,070

HFE-329me3 428454-68-6 CF3 CFHCF2 OCF3 b 4,550

1,1,1,2,2,3,3-Heptafluoro-3-(1,2,2,2-tetrafluoroethoxy)-propane 3330-15-2 CF3 CF2 CF2 OCHFCF3 b 6,490

Saturated HFEs and HCFEs With Two Carbon-Hydrogen Bonds

HFE-134 (HG-00) 1691-17-4 CHF2 OCHF2 d 5,560

HFE-236ca 32778-11-3 CHF2 OCF2 CHF2 b 4,240

HFE-236ca12 (HG-10) 78522-47-1 CHF2 OCF2 OCHF2 d 5,350

HFE-236ea2 (Desflurane) 57041-67-5 CHF2 OCHFCF3 d 1,790

HFE-236fa 20193-67-3 CF3 CH2 OCF3 d 979

HFE-338mcf2 156053-88-2 CF3 CF2 OCH2 CF3 d 929

HFE-338mmz1 26103-08-2 CHF2 OCH(CF3)2 d 2,620

HFE-338pcc13 (HG-01) 188690-78-0 CHF2 OCF2 CF2 OCHF2 d 2,910

HFE-43-10pccc (H-Galden 1040x, HG-11) E1730133 CHF2 OCF2 OC2 F4 OCHF2 d 2,820

HCFE-235ca2 (Enflurane) 13838-16-9 CHF2 OCF2 CHFCl b 583

HCFE-235da2 (Isoflurane) 26675-46-7 CHF2 OCHClCF3 d 491

HG-02 205367-61-9 HF2 C-(OCF2 CF2)2-OCF2 H b d 2,730

HG-03 173350-37-3 HF2 C-(OCF2 CF2)3-OCF2 H b d 2,850

HG-20 249932-25-0 HF2 C-(OCF2)2-OCF2 H b 5,300

HG-21 249932-26-1 HF2 C-OCF2 CF2 OCF2 OCF2 O-CF2 H b 3,890

HG-30 188690-77-9 HF2 C-(OCF2)3-OCF2 H 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 HCF2 O(CF2 CF2 O)4 CF2 H b 3,630

1,1,2-Trifluoro-2-(trifluoromethoxy)-ethane 84011-06-3 CHF2 CHFOCF3 b 1,240

Trifluoro(fluoromethoxy)methane 2261-01-0 CH2 FOCF3 b 751

Saturated HFEs and HCFEs With Three or More Carbon-Hydrogen Bonds

HFE-143a 421-14-7 CH3 OCF3 d 523

HFE-245cb2 22410-44-2 CH3 OCF2 CF3 d 654

HFE-245fa1 84011-15-4 CHF2 CH2 OCF3 d 828

HFE-245fa2 1885-48-9 CHF2 OCH2 CF3 d 812

HFE-254cb1 425-88-7 CH3 OCF2 CHF2 d 301

HFE-263fb2 460-43-5 CF3 CH2 OCH3 d 1

HFE-263m1; R-E-143a 690-22-2 CF3 OCH2 CH3 b 29

HFE-347mcc3 (HFE-7000) 375-03-1 CH3 OCF2 CF2 CF3 d 530

HFE-347mcf2 171182-95-9 CF3 CF2 OCH2 CHF2 d 854

HFE-347mmy1 22052-84-2 CH3 OCF(CF3)2 d 363

HFE-347mmz1 (Sevoflurane) 28523-86-6 (CF3)2 CHOCH2 F c 216

HFE-347pcf2 406-78-0 CHF2 CF2 OCH2 CF3 d 889

HFE-356mec3 382-34-3 CH3 OCF2 CHFCF3 d 387

HFE-356mff2 333-36-8 CF3 CH2 OCH2 CF3 b 17

HFE-356mmz1 13171-18-1 (CF3)2 CHOCH3 d 14

HFE-356pcc3 160620-20-2 CH3 OCF2 CF2 CHF2 d 413

HFE-356pcf2 50807-77-7 CHF2 CH2 OCF2 CHF2 d 719

HFE-356pcf3 35042-99-0 CHF2 OCH2 CF2 CHF2 d 446

HFE-365mcf2 22052-81-9 CF3 CF2 OCH2 CH3 b 58

HFE-365mcf3 378-16-5 CF3 CF2 CH2 OCH3 d 0.99

HFE-374pc2 512-51-6 CH3 CH2 OCF2 CHF2 d 627

HFE-449s1 (HFE-7100) Chemical blend 163702-07-6 C4 F9 OCH3 d 421

163702-08-7 (CF3)2 CFCF2 OCH3

HFE-569sf2 (HFE-7200) Chemical blend 163702-05-4 C4 F9 OC2 H5 d 57

163702-06-5 (CF3)2 CFCF2 OC2 H5

HFE-7300 132182-92-4 (CF3)2 CFCFOC2 H5 CF2 CF2 CF3 e 405

HFE-7500 297730-93-9 n-C3 F7 CFOC2 H5 CF(CF3)2 e 13

HG′-01 73287-23-7 CH3 OCF2 CF2 OCH3 b 222

HG′-02 485399-46-0 CH3 O(CF2 CF2 O)2 CH3 b 236

HG′-03 485399-48-2 CH3 O(CF2 CF2 O)3 CH3 b 221

Difluoro(methoxy)methane 359-15-9 CH3 OCHF2 b 144

2-Chloro-1,1,2-trifluoro-1-methoxyethane 425-87-6 CH3 OCF2 CHFCl b 122

1-Ethoxy-1,1,2,2,3,3,3-heptafluoropropane 22052-86-4 CF3 CF2 CF2 OCH2 CH3 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 C12 H5 F19 O2 b 56

1-Ethoxy-1,1,2,3,3,3-hexafluoropropane 380-34-7 CF3 CHFCF2 OCH2 CH3 b 23

Fluoro(methoxy)methane 460-22-0 CH3 OCH2 F b 13

1,1,2,2-Tetrafluoro-3-methoxy-propane; Methyl 2,2,3,3-tetrafluoropropyl ether 60598-17-6 CHF2 CF2 CH2 OCH3 b d 0.49

1,1,2,2-Tetrafluoro-1-(fluoromethoxy)ethane 37031-31-5 CH2 FOCF2 CF2 H b 871

Difluoro(fluoromethoxy)methane 461-63-2 CH2 FOCHF2 b 617

Fluoro(fluoromethoxy)methane 462-51-1 CH2 FOCH2 F b 130

Saturated Chlorofluorocarbons (CFCs)

E-R316c 3832-15-3 trans-cyc (-CClFCF2 CF2 CClF-) e 4,230

Z-R316c 3934-26-7 cis-cyc (-CClFCF2 CF2 CClF-) e 5,660

Fluorinated Formates

Trifluoromethyl formate 85358-65-2 HCOOCF3 b 588

Perfluoroethyl formate 313064-40-3 HCOOCF2 CF3 b 580

1,2,2,2-Tetrafluoroethyl formate 481631-19-0 HCOOCHFCF3 b 470

Perfluorobutyl formate 197218-56-7 HCOOCF2 CF2 CF2 CF3 b 392

Perfluoropropyl formate 271257-42-2 HCOOCF2 CF2 CF3 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 HCOOCH2 CF3 b 33

3,3,3-Trifluoropropyl formate 1344118-09-7 HCOOCH2 CH2 CF3 b 17

Fluorinated Acetates

Methyl 2,2,2-trifluoroacetate 431-47-0 CF3 COOCH3 b 52

1,1-Difluoroethyl 2,2,2-trifluoroacetate 1344118-13-3 CF3 COOCF2 CH3 b 31

Difluoromethyl 2,2,2-trifluoroacetate 2024-86-4 CF3 COOCHF2 b 27

2,2,2-Trifluoroethyl 2,2,2-trifluoroacetate 407-38-5 CF3 COOCH2 CF3 b 7

Methyl 2,2-difluoroacetate 433-53-4 HCF2 COOCH3 b 3

Perfluoroethyl acetate 343269-97-6 CH3 COOCF2 CF3 b d 2

Trifluoromethyl acetate 74123-20-9 CH3 COOCF3 b d 2

Perfluoropropyl acetate 1344118-10-0 CH3 COOCF2 CF2 CF3 b d 2

Perfluorobutyl acetate 209597-28-4 CH3 COOCF2 CF2 CF2 CF3 b d 2

Ethyl 2,2,2-trifluoroacetate 383-63-1 CF3 COOCH2 CH3 b d 1

Carbonofluoridates

Methyl carbonofluoridate 1538-06-3 FCOOCH3 b 95

1,1-Difluoroethyl carbonofluoridate 1344118-11-1 FCOOCF2 CH3 b 27

Fluorinated Alcohols Other Than Fluorotelomer Alcohols

Bis(trifluoromethyl)-methanol 920-66-1 (CF3)2 CHOH d 182

2,2,3,3,4,4,5,5-Octafluorocyclopentanol 16621-87-7 cyc (-(CF2)4 CH(OH)-) d 13

2,2,3,3,3-Pentafluoropropanol 422-05-9 CF3 CF2 CH2 OH d 19

2,2,3,3,4,4,4-Heptafluorobutan-1-ol 375-01-9 C3 F7 CH2OH b d 34

2,2,2-Trifluoroethanol 75-89-8 CF3 CH2 OH b 20

2,2,3,4,4,4-Hexafluoro-1-butanol 382-31-0 CF3 CHFCF2 CH2 OH b 17

2,2,3,3-Tetrafluoro-1-propanol 76-37-9 CHF2 CF2 CH2 OH b 13

2,2-Difluoroethanol 359-13-7 CHF2 CH2OH b 3

2-Fluoroethanol 371-62-0 CH2 FCH2 OH b 1.1

4,4,4-Trifluorobutan-1-ol 461-18-7 CF3 (CH2)2 CH2 OH b 0.05

Non-Cyclic, Unsaturated Perfluorocarbons (PFCs)

PFC-1114; TFE 116-14-3 CF2 = CF2; C2 F4 b 0.004

PFC-1216; Dyneon HFP 116-15-4 C3 F6; CF3 CF = CF2 b 0.05

Perfluorobut-2-ene 360-89-4 CF3 CF = CFCF3 b 1.82

Perfluorobut-1-ene 357-26-6 CF3 CF2 CF = 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 C2 H2 F2, CF2 = CH2 b 0.04

HFC-1141; VF 75-02-5 C2 H3 F, CH2 = CHF b 0.02

(E)-HFC-1225ye 5595-10-8 CF3 CF = CHF(E) b 0.06

(Z)-HFC-1225ye 5528-43-8 CF3 CF = CHF(Z) b 0.22

Solstice 1233zd(E) 102687-65-0 C3 H2 ClF3; CHCl = CHCF3 b 1.34

HCFO-1233zd(Z) 99728-16-2 (Z)-CF3 CH = CHCl e 0.45

HFC-1234yf; HFO-1234yf 754-12-1 C3 H2 F4; CF3 CF = CH2 b 0.31

HFC-1234ze(E) 1645-83-6 C3 H2 F4; trans-CF3 CH = CHF b 0.97

HFC-1234ze(Z) 29118-25-0 C3 H2 F4; cis-CF3 CH = CHF; CF3 CH = CHF b 0.29

HFC-1243zf; TFP 677-21-4 C3 H3 F3, CF3 CH = CH2 b 0.12

(Z)-HFC-1336 692-49-9 CF3 CH = CHCF3 (Z) b 1.58

HFO-1336mzz(E) 66711-86-2 (E)-CF3 CH = CHCF3 e 18

HFC-1345zfc 374-27-6 C2 F5 CH = CH2 b 0.09

HFO-1123 359-11-5 CHF=CF2 e 0.005

HFO-1438ezy(E) 14149-41-8 (E)-(CF3)2 CFCH = CHF e 8.2

HFO-1447fz 355-08-8 CF3 (CF2)2 CH = CH2 e 0.24

Capstone 42-U 19430-93-4 C6 H3 F9, CF3 (CF2)3 CH = CH2 b 0.16

Capstone 62-U 25291-17-2 C8 H3 F13, CF3 (CF2)5 CH = CH2 b 0.11

Capstone 82-U 21652-58-4 C10 H3 F17, CF3 (CF2)7 CH = 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)2 C = 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 CF3 OCF = CF2 b 0.17

Fluoroxene 406-90-6 CF3 CH2 OCH = CH2 b 0.05

Methyl-perfluoroheptene-ethers N/A CH3 OC7 F13 e 15

Non-Cyclic, Unsaturated Halogenated Esters

Ethenyl 2,2,2-trifluoroacetate 433-28-3 CF3 COOCH=CH2 e 0.008

Prop-2-enyl 2,2,2-trifluoroacetate 383-67-5 CF3 COOCH2 CH=CH2 e 0.007

Cyclic, Unsaturated HFCs and PFCs

PFC C-1418 559-40-0 c-C5 F8 d 2

Hexafluorocyclobutene 697-11-0 cyc (-CF=CFCF2 CF2-) e 126

1,3,3,4,4,5,5-heptafluorocyclopentene 1892-03-1 cyc (-CF2 CF2 CF2 CF=CH-) e 45

1,3,3,4,4-pentafluorocyclobutene 374-31-2 cyc (-CH=CFCF2 CF2-) e 92

3,3,4,4-tetrafluorocyclobutene 2714-38-7 cyc (-CH=CHCF2 CF2-) e 26

Fluorinated Aldehydes

3,3,3-Trifluoro-propanal 460-40-2 CF3 CH2 CHO b 0.01

Fluorinated Ketones

Novec 1230 (perfluoro (2-methyl-3-pentanone)) 756-13-8 CF3 CF2 C(O)CF (CF3)2 b 0.1

1,1,1-trifluoropropan-2-one 421-50-1 CF3 COCH3 e 0.09

1,1,1-trifluorobutan-2-one 381-88-4 CF3 COCH2 CH3 e 0.095

Fluorotelomer Alcohols

3,3,4,4,5,5,6,6,7,7,7-Undecafluoroheptan-1-ol 185689-57-0 CF3 (CF2)4 CH2 CH2 OH b 0.43

3,3,3-Trifluoropropan-1-ol 2240-88-2 CF3 CH2 CH2 OH 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)6 CH2 CH2 OH 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)8 CH2 CH2 OH b 0.19

Fluorinated GHGs With Carbon-Iodine Bond(s)

Trifluoroiodomethane 2314-97-8 CF3 I b 0.4

Remaining Fluorinated GHGs with Chemical-Specific GWPs

Dibromodifluoromethane (Halon 1202) 75-61-6 CBr2 F2 b 231

2-Bromo-2-chloro-1,1,1-trifluoroethane (Halon-2311/Halothane) 151-67-7 CHBrClCF3 b 41

Heptafluoroisobutyronitrile 42532-60-5 (CF3)2 CFCN 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.