... .7kg (50lbs)2.Applications:Chlorodifluoromethane (HCFC-22),a colorless gas at room temperature,is acolorless ,non - toxic,non-flammable ... for PTFE productionand intermediate for Halon 1211 production.Refrigerant gas is used in household , industrial and commercial airconditioning systems ... ,r125,r290,r401a,r408a,r409a,r415b,r417a,r502,r507a,r600a etc.In addition,we also are professional in doing ...