Product quality index: Isobutane(v/v)% ¨R99.9% Sulphur(ppm) <1ppm Water(ppm) ¡Ü10ppm Moisture(ppm) ¡Ü10ppm Unsaturated hydrocarbon (ppm) ¡Ü100ppm Residues ml/100ml None Odor None Usage: No.1: R600a is mainly used as ultra-low temperature refrigerant. Refrigeration system composed of R22 and R600a is used for -80---120¡æ cryogenic refrigeration device; No.2: It can be dehydrogenized for butadiene, can be oxidized for acetic anhydride and butylene anhydride; No.3: Also it can be reacted with sulphur to produce thiophene; And it can be used as foaming agent too.