ELECTRONIC CODE OF FEDERAL REGULATIONS

e-CFR Data is current as of February 26, 2014

Title 40: Protection of Environment 

PART 98—MANDATORY GREENHOUSE GAS REPORTING 

Subpart A—General Provision

TABLE A-1 TO SUBPART A OF PART 98—GLOBAL WARMING POTENTIALS

GLOBAL WARMING POTENTIALS

[100-Year Time Horizon]

Name CAS No. Chemical formula

Global warming 

potential 

(100 yr.)

Carbon dioxide 124-38-9 CO2 1

Methane 74-82-8 CH4 a

25

Nitrous oxide 10024-97-2 N2O a

298

HFC-23 75-46-7 CHF3 a

14,800

HFC-32 75-10-5 CH2F2 a

675

HFC-41 593-53-3 CH3F a

92

HFC-125 354-33-6 C2HF5 a

3,500

HFC-134 359-35-3 C2H2F4 a

1,100

HFC-134a 811-97-2 CH2FCF3 a

1,430

HFC-143 430-66-0 C2H3F3 a

353

HFC-143a 420-46-2 C2H3F3 a

4,470

HFC-152 624-72-6 CH2FCH2F 53

HFC-152a 75-37-6 CH3CHF2 a

124

HFC-161 353-36-6 CH3CH2F 12

HFC-227ea 431-89-0 C3HF7 a

3,220

HFC-236cb 677-56-5 CH2FCF2CF3 1,340

HFC-236ea 431-63-0 CHF2CHFCF3 1,370

HFC-236fa 690-39-1 C3H2F6 a

9,810

HFC-245ca 679-86-7 C3H3F5 a

693

HFC-245fa 460-73-1 CHF2CH2CF3 1,030

HFC-365mfc 406-58-6 CH3CF2CH2CF3 794

HFC-43-10mee 138495-42-

8

CF3CFHCFHCF2CF3 a

1,640

Sulfur hexafluoride 2551-62-4 SF6 a

22,800

Trifluoromethyl sulphur pentafluoride 373-80-8 SF5CF3 17,700

Nitrogen trifluoride 7783-54-2 NF3 17,200

eCFR — Code of Federal Regulations Page 1 of 3

http://www.ecfr.gov/cgi-bin/text-idx?SID=06c61503a771a9ecf10e61b8695eaccb&node=40:22.0.1... 2/28/2014
PFC-14 (Perfluoromethane) 75-73-0 CF4 a

7,390

PFC-116 (Perfluoroethane) 76-16-4 C2F6 a

12,200

PFC-218 (Perfluoropropane) 76-19-7 C3F8 a

8,830

Perfluorocyclopropane 931-91-9 C-C3F6 17,340

PFC-3-1-10 (Perfluorobutane) 355-25-9 C4F10 a

8,860

PFC-318 (Perfluorocyclobutane) 115-25-3 C-C4F8 a

10,300

PFC-4-1-12 (Perfluoropentane) 678-26-2 C5F12 a

9,160

PFC-5-1-14 (Perfluorohexane, FC-72) 355-42-0 C6F14 a

9,300

PFC-9-1-18 306-94-5 C10F18 7,500

HCFE-235da2 (Isoflurane) 26675-46-7 CHF2OCHClCF3 350

HFE-43-10pccc (H-Galden 1040x, HG11)E1730133 CHF2OCF2OC2F4OCHF2 1,870

HFE-125 3822-68-2 CHF2OCF3 14,900

HFE-134 (HG-00) 1691-17-4 CHF2OCHF2 6,320

HFE-143a 421-14-7 CH3OCF3 756

HFE-227ea 2356-62-9 CF3CHFOCF3 1,540

HFE-236ca12 (HG-10) 78522-47-1 CHF2OCF2OCHF2 2,800

HFE-236ea2 (Desflurane) 57041-67-5 CHF2OCHFCF3 989

HFE-236fa 20193-67-3 CF3CH2OCF3 487

HFE-245cb2 22410-44-2 CH3OCF2CF3 708

HFE-245fa1 84011-15-4 CHF2CH2OCF3 286

HFE-245fa2 1885-48-9 CHF2OCH2CF3 659

HFE-254cb2 425-88-7 CH3OCF2CHF2 359

HFE-263fb2 460-43-5 CF3CH2OCH3 11

HFE-329mcc2 134769-21-

4

CF3CF2OCF2CHF2 919

HFE-338mcf2 156053-88-

2

CF3CF2OCH2CF3 552

HFE-338pcc13 (HG-01) 188690-78-

0

CHF2OCF2CF2OCHF2 1,500

HFE-347mcc3 (HFE-7000) 375-03-1 CH3OCF2CF2CF3 575

HFE-347mcf2 171182-95-

9

CF3CF2OCH2CHF2 374

HFE-347pcf2 406-78-0 CHF2CF2OCH2CF3 580

HFE-356mec3 382-34-3 CH3OCF2CHFCF3 101

HFE-356pcc3 160620-20-

2

CH3OCF2CF2CHF2 110

HFE-356pcf2 50807-77-7 CHF2CH2OCF2CHF2 265

HFE-356pcf3 35042-99-0 CHF2OCH2CF2CHF2 502

HFE-365mcf3 378-16-5 CF3CF2CH2OCH3 11

HFE-374pc2 512-51-6 CH3CH2OCF2CHF2 557

HFE-449s1 (HFE-7100) 163702-07-

6

C4F9OCH3 297

Chemical blend 163702-08-

7

(CF3)2CFCF2OCH3

HFE-569sf2 (HFE-7200) 163702-05-

4

C4F9OC2H5 59

eCFR — Code of Federal Regulations Page 2 of 3

http://www.ecfr.gov/cgi-bin/text-idx?SID=06c61503a771a9ecf10e61b8695eaccb&node=40:22.0.1... 2/28/2014
For questions or comments regarding e-CFR editorial content, features, or design, email ecfr@nara.gov. 

For questions concerning e-CFR programming and delivery issues, email webteam@gpo.gov. 

Chemical blend 163702-06-

5

(CF3)2CFCF2OC2H5

Sevoflurane (HFE-347mmz1) 28523-86-6 CH2FOCH(CF3)2 345

HFE-356mm1 13171-18-1 (CF3)2CHOCH3 27

HFE-338mmz1 26103-08-2 CHF2OCH(CF3)2 380

(Octafluorotetramethy-lene) 

hydroxymethyl group

NA X-(CF2)4CH(OH)-X 73

HFE-347mmy1 22052-84-2 CH3OCF(CF3)2 343

Bis(trifluoromethyl)-methanol 920-66-1 (CF3)2CHOH 195

2,2,3,3,3-pentafluoropropanol 422-05-9 CF3CF2CH2OH 42

PFPMIE (HT-70) NA CF3OCF(CF3)

CF2OCF2OCF3

10,300

a

The GWP for this compound is different than the GWP in the version of Table A-1 to subpart A of 

part 98 published on October 30, 2009.

[78 FR 71948, Nov. 29, 2013]

eCFR — Code of Federal Regulations Page 3 of 3

http://www.ecfr.gov/cgi-bin/text-idx?SID=06c61503a771a9ecf10e61b8695eaccb&node=40:22.0.1... 2/28/2014