R-410a, sold under the trademarked names az-20, ecofluor r410, forane 410a, genetron r410a, puron, and suva 410a, is a zeotropic but near-azeotropic mixture of difluoromethane (ch2f2, called r-32) and pentafluoroethane (chf2cf3, called r-125) that is used as a refrigerant in air conditioning applications.