... blend refrigerants such as R404, R408, R507. 3.High Purity 1,1,1-Trifluoroethane, or R-143a ... that is a clear, colorless gas. It should not be confused with the isomeric compound 1,1,2 ... therefore not an ozone-depleting chemical, though its high chemical stability and infra-red absorbency make it ... a potent greenhouse gas.Trifluoroethane is also used as a propellant in ...