R-125

Pentafluoroethane is a fluorocarbon currently used as a refrigerant (known as R-125) and also used as a fire suppression agent in fire suppression systems.
Pentafluoroethane does not deplete ozone so it has replaced earlier fluorinated chemicals that did. However while it has zero ozone depletion potential, it has high global warming potential, reported by the United States Environmental Protection Agency (EPA) as 3450 times that of carbon dioxide.