40 CFR Part 84, Appendix A
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| HFC | Chemical formula | Exchange value |
|---|---|---|
| HFC-134 | CHF2 CHF2 | 1,100 |
| HFC-134a | CH2 FCF3 | 1,430 |
| HFC-143 | CH2 FCHF2 | 353 |
| HFC-245fa | CHF2 CH2 CF3 | 1,030 |
| HFC-365mfc | CF3 CH2 CF2 CH3 | 794 |
| HFC-227ea | CF3 CHFCF3 | 3,220 |
| HFC-236cb | CH2 FCF2 CF3 | 1,340 |
| HFC-236ea | CHF2 CHFCF3 | 1,370 |
| HFC-236fa | CF3 CH2CF3 | 9,810 |
| HFC-245ca | CH2 FCF2 CHF2 | 693 |
| HFC-43-10mee | CF3 CHFCHFCF2 CF3 | 1,640 |
| HFC-32 | CH2 F2 | 675 |
| HFC-125 | CHF2 CF3 | 3,500 |
| HFC-143a | CH3 CF3 | 4,470 |
| HFC-41 | CH3 F | 92 |
| HFC-152 | CH2 FCH2 F | 53 |
| HFC-152a | CH3 CHF2 | 124 |
| HFC-23 | CHF3 | 14,800 |
1 This table includes all isomers of the substances above, regardless of whether the isomer is explicitly listed on its own.
[86 FR 55222, Oct. 5, 2021]