HFC-134A is internationally recognized excellent substitute of CFCs, with excellent physical and chemical properties: nontoxic, colorless, tasteless, inexplosive, nonflammable, ODP is 0. It is widely used in refrigerant of vehicle air conditioning, regrigerator, cosmetic and commercial refrigeration, etc. And it can be used as aerosol, fire retardant and foaming agent in pharmaceutical, pesticide, cosmetic, cleansing and such industries. It is also a kind of important mixing refrigerant