1?Physical properties?Molecular weight52.02Boiling point under 1.013×105 Pa(?) -53.15Density of liquid at 25?(g/m3) 0.960Vapor pressure at 25??Mpa1.702Critical temperature? 78.25Critical pressure MPA5.808Critical density?g/cm30.430Latent heat of vaporation at bp ?kJ/kg390.5Solubility in water at 25?, % by weight0.440Specific heat, liquid, 25? kJ/kg?2.35Ozone-Depletion Potential ?ODP?0Global Warming Potential ?GWP?0.11 2?Quality StandardGradeExcellent Grade1ST. GradePurity?%?99.899.5Moisture?PPM?