Physical Characteristics Appearance Coloured Liquid Gas Boiling Point: -15.1 ¡F, -26.2 ¡C Vapor Pressure (mmHg in 20 ¡C: 4268 Vapor Density (Air = 1): 3.3 Solubility in water Very Low Ph: not Applicable Specific Gravity: 1.23 On 20 ¡C Volatile% Volume: 100