US EPA - Global Warming Potentials
Global Warming Potentials of Ozone Depletors and Substitutes
Pharos has compiled the EPA list identifying the global warming potential of ozone depleting chemicals and chemicals used to substitute for ozone depleting refrigerants, insulation blowing gases, cleaners, etc.. The global warming potential (GWP) represents how much a given mass of a chemical contributes to global warming over a given time period compared to the same mass of carbon dioxide. Carbon dioxide's GWP is defined as 1.0.
Pharos scoring is based upon anorder of magnitude scaling of GWP.
One chemical (Halon 2402 (C2F4Br2) Dibromotetrafluoroethane) with GWP of 7370 is taken from a list of ozone-depleting substances at https://www.epa.gov/ozone-layer-protection/ozone-depleting-substances.
Note three chemicals on this list - the pentane isomers - all with GWP of 11 - are not actually listed directly on the EPA list but originate from Table A-2.1 in the Montreal Protocol on Substances That Deplete the Ozone Layer - 2002 Report of the Rigid and Flexible Foams Technical Options Committee 2002 Assessment http://ozone.unep.org/Assessment_Panels/TEAP/Reports/FTOC/FTOC-2002-Assessment-Report.pdf\
The EPA has reorganized its website, and these data are no longer available in this format. Because of this, we provide a link to an archived version.