Chlorobenzenes physical constants

Physical constants for chlorobenzene, especially its vapor pressure and water solubility, indicate that the air is an important and perhaps the dominant medium for the transport and transformation of chlorobenzene. As an aromatic molecule with strong UV-absorption, chlorobenzene has a half-life of 20 to 40 hrs under simulated atmospheric conditions (Dilling et al. 1976). This appears to be confirmed by the large difference between chlorobenzene measurements in urban air (3,000 ng/m ) and in rural air (not detected) in 1982 (Brodzinsky and Singh 1983). 

Chlorobenzene(s), 3 602 6 211-225 24 275 Antoine constants, 6 215t from benzene, 3 619t, 620 chlorocarbon/chlorohydrocarbon of industrial importance, 6 227t diffusion coefficient in air at 0° C, l 70t economic aspects, 6 219-222 health and safety factors, 6 218-219 manufacture, 6 213-217 physical and thermodynamic properties, 6 214t... 

Temperature Dependence of Physical-Chemical Properties of Selected Chemicals of Environmental Interest. II Chlorobenzenes, Polychlorinated Biphenyls, Polychlorinated Dibenzo-p-dioxins, and Dibenzofurans This comprehensive data set compiles aqueous solubility, vapor pressure and Henry s law constant for temperatures in the environmental range. Recommended values are given along with equations for estimating values as a function of temperature. Phase change enthalpies are also included. 

Hinckley DA, Bidleman TF (1990) Determination of vapor pressures for nonpolar and semipolar organic compounds from gas chromatographic retention data. J Chem Eng Data 35 232-237 Holsen TM, Noll KE (1992) Dry deposition of atmospheric particles application of current models to ambient data. Environ Sci Technol 26 1807-1815 Hulscher TT, Velde LE, Bruggeman WA (1992) Temperature dependence of henry s law constants for selected chlorobenzenes, PCBs and PAHs. Environ Toxicol Chem 11 1595-1603 Jaenicke R (1988) Aerosol physics and chemistry. In Fischer G (ed) Landolt-Bdrnstein Zahlenwerte und Funktionen aus Naturwissenschaft und Technik, Band 4. Meteorologie. Springer, Berlin... 

TABLE 1 gives the reported values or ranges of the physical-chemical properties of chlorobenzenes (CBs), polychlorinated biphenyls (PCBs) and polychlorinated dibenzo-p-dioxins (PCDDs). Fugacity ratios were obtained from a single estimated entropy of fusion of 56 J mol °K (Yalkowsky 1979), molar volumes were calculated by the Le Bas method, an additive group contribution method (Reid et al. 1977). Total surface area (TSA) values were obtained from Yalkowsky et al. (1979 a,b). Solubilities, vapour pressures and octanol/water partition coefficients (Andren et al. 1986 Shiu and Mackay 1986 Bobra et al. 1985) are also tabulated. Henry s law constants were calculated as PSl/C and the octanol solubility Q as C Kq, . 

TABLE 1 Selected physical-chemical properties of the chlorobenzenes, polychorobiphenyls, and polychlorodiben-zo-p-dioxins, at 25° C. Given are molecular weight (MW) melting point (mp), fugicity ratio (F), total surface area, aqueous solubility of solid (Cg) and subcooled liquid (Cl), vapour pressure of solid (Pg) and subcooled liquid (Pl), Henry s law constant (H), log octanol/water partition coefficient (log Kq ), and the product Q = Cg log Kq -... 

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