R-410A, sold under the trademarked names Puron, Genetron R410A, and AZ-20,'s a near-azeotropic mixture of difluoromethane (CH2F2, called R-32) and pentafluoroethane (C2HF5, called R-125) which's used as a refrigerant in air conditioning applications. Unlike many haloalkane refrigerants it doesn't contribute to ozone depletion, and's therefore becoming more widely used as ozone-depleting refrigerants like R-22 are phased out. However, it's a high global warming potential of 1725 (1725 times the e… (More on R-410a)