PHYSICOCHEMICAL PROPERTIES OF POLYCYCLIC AROMATIC-HYDROCARBONS - AQUEOUS SOLUBILITIES, N-OCTANOL WATER PARTITION-COEFFICIENTS, AND HENRYS LAW CONSTANTS/

Aqueous solubilities, n-octanol/water partition coefficients (K(ow)s), and Henry's law constants were determined for a range of polycyclic a romatic hydrocarbons (PAHs) using a generator-column, slow-stirring, a nd gas-purge method, respectively. The currently obtained data were co mpared to available literature data. For seven of the PAHs no K(ow)s p reviously were determined with the slow-stirring method. For four of t he PAHs the present study reports the first experimental Henry's law c onstants. Relationships between subcooled liquid solubilities, K(ow)s, and Henry's law constants as a function of molar volume are discussed . A consistent data set was obtained, for which an excellent correlati on was found between subcooled liquid solubility and molar volume. A l inear fit did not accurately describe the relationship between log K-o w and molar volume. This is probably due to a decreasing solubility in n-octanol with increasing molar volume. Finally, a high correlation w as found between Henry's law constant and molar volume. The presently obtained dataset can be used to predict the fate and behavior of unsub stituted homocyclic PAHs.