... 82Relative Density(30°C), liquid, g/cm3 1.177Melting Point, °C-160.00Critical Temperature, °C96.15Critical Pressure, ... 30°C , (g/cm3 )1.174Specific heat of e quipressure vapor(Cp) , 30°Cand 101.3kPa[KJ/( ... 0.16Critical density , g/cm30.526Vaporization heat below boiling point , KJ/Kg233.53. Quality Index (GB7373-87) ... .00010.0001evaporation residue, %≤0.010.010.02 Air conditioner refrigerant gas R22