Code of Federal Regulations > Title 40 > Chapter I > Part 82 > Subpart A > Appendix Appendix I - Appendix I to Subpart A of Part 82—Global Warming Potentials (Mass Basis), Referenced to the Absolute GWP for the Adopted Carbon Cycle Model CO2 Decay Response and Future CO2 Atmospheric Concentrations Held Constant at Current Levels. (Only Direct Effects Are Considered.)

Regulations last checked for updates: Feb 22, 2025

Title 40 - Protection of Environment last revised: Nov 22, 2025

Appendix Appendix I - Appendix I to Subpart A of Part 82—Global Warming Potentials (Mass Basis), Referenced to the Absolute GWP for the Adopted Carbon Cycle Model CO2 Decay Response and Future CO2 Atmospheric Concentrations Held Constant at Current Levels. (Only Direct Effects Are Considered.)

Species (chemical)	Chemical formula	Global warming potential (time horizon)
Species (chemical)	Chemical formula	20 years	100 years	500 years
CFC-11	CFCl3	5000	4000	1400
CFC-12	CF2 Cl2	7900	8500	4200
CFC-13	CClF3	8100	11700	13600
CFC-113	C2 F3 Cl3	5000	5000	2300
CFC-114	C2 F4 Cl2	6900	9300	8300
CFC-115	C2 F5 Cl	6200	9300	13000
H-1301	CF3 Br	6200	5600	2200
Carbon Tet	CCl4	2000	1400	500
Methyl Chl	CH3 CCl3	360	110	35
HCFC-22	CF2 HCl	4300	1700	520
HCFC-141b	C2 FH3 Cl2	1800	630	200
HCFC-142b	C2 F2 H3 Cl	4200	2000	630
HCFC-123	C2 F3 HCl2	300	93	29
HCFC-124	C2 F4 HCl	1500	480	150
HCFC-225ca	C3 F5 HCl2	550	170	52
HCFC-225cb	C3 F5 HCl2	1700	530	170

AUnited Nations Environment Programme (UNEP), February 1995, Scientific Assessment of Ozone Depletion: 1994, Chapter 13, “Ozone Depleting Potentials, Global Warming Potentials and Future Chlorine/Bromine Loading,” and do not reflect review of scientific documents published after that date.

[61 FR 1285, Jan. 19, 1996]

authority: 42 U.S.C. 7414,7601,7671

source: 57 FR 33787, July 30, 1992, unless otherwise noted.