... atm), °C32.05Freezing Point (1 atm), °C-103.5Density of liquid at 25 °C, g/cm31.227Vapour of Density (Air=1 ... )0.09Critical Temperature °C204.5 2. QUALITY INDEX Index NameIndexAppearanceClear, transparent, colorless liquidPurity, %≥99.5Moisture,mg/kg ≤50Acidity (as HCl), ≤1.0evaporation ...