Critical Parameters and Vapor Pressure Measurements of Potential Replacements for ChlorofluorocarbonsFour Hydrofluoroketones and a Hydrofluoroamine

Critical parameters and vapor pressures of five possible replacement compounds for chlorofluorocarbons-four hydrofluoroketones and a hydrofluoroamine-were measured with an accuracy of ±10 mK, ±0.5 kPa, and ±1 kg.m -3 . Critical temperatures, pressures, and densities were in the ranges from 450 to 500 K, from 2.3 to 3 MPa, and from 450 to 550 kg.m -3 , respectively. Among the fSMive compounds examined, one of the hydrofluoroketones, HFK-354pc (CHF 2 CF 2 C(=O)CH 3 ), was relatively unstable.