Refrigerant R134a is mainly used to substitute CFC-12 as refrigerant in car conditioning and refrigerating and refrigerating in refrigerator Boiling Point º C: -27 Critical temperature º C: 115 Critical Pressure Mpa: 4.7 Saturation steam pressure (mpa), 25 º C 0.7 Relative density( water=1) 1.12 Relative vapor density ( air=1) 2.79 Appearance : Colorless, no cloudy Odor Odorless Purity ≥% 99.5 Water, ppm ≤ 10 Acidity, ppm ≤ 1 Residue mg/kg ≤ 100 Non-congealing gas-phase, % (v/v), ≤ 1.5