Critical pressure phosgene

I he critical properties of phosgene have been determined expert menially. , x M The method of Vow les has been used to esilmatr the other critical temperatures with a probable ei for of less than 5 C. and live critical densities within 0.01 gramcmilliliter The critical pressures w-erc estimated by the method ol Lvdeison. C [Pg.26]

Only a few of the physical properties of COBrF have been measured. Carbonyl bromide fluoride (relative molecular mass 126.91) is a colourless gas, with an odour similar to, but distinguishable from, phosgene [1195]. The melting point at atmospheric pressure of COBrF has been reported as -120 2 C [1196a], and the boiling point as -20.6 "C [1196a]. Its critical temperature occurs at +124 C, and its critical pressure is ca. 6.18 MPa [656a,1751]. 

Stull presents vupor pressure data on phosgene up to its critical point.3 Data up to ihc boiling point are available lor the other three compounds. V, JI The method of Miller1, has been used to calculate the vapor pressure of these compounds up to (he critical point. The meihod gave an average error of ]. 4% when compared to experimental data for phosgene... 

Between 0 "C and the critical temperature, the vapour pressure data of phosgene have been summarized by Equation (6.6) (T in K) [744] and, for data above atmospheric pressure, by Equation (6.7) [1843] ... 

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