Aqueous solubility (in the range between 298.15 and 338.15 K), vapor pressures (in the range between 10−5 and 80 Pa) and Henry's law constant of 1,2,3,4-dibenzanthracene and 1,2,5,6-dibenzanthracene

- Vapor pressures of heavy polycyclic aromatic hydrocarbons (PAHs) were determined by chromatographic method.
- Aqueous solubility of PAH were determined by a saturation technique.
- Henry's law constant and partition of PAH between atmosphere and water was deduced from solubility and volatility data.

Aqueous solubility and vapor pressures of 1,2,3,4-dibenzanthracene and 1,2,5,6-dibenzanthracene were determined using dynamic saturation methods. For the two isomers, aqueous solubility is in the range between 10−10 and 10−2 in molar fraction corresponding to temperature between 298.15 and 338.15 K. Vapor pressures of the pure solutes range from 10−5 to 80 Pa. Prior to the study of the two dibenzanthracenes and in order to check the experimental procedures, solubility of fluoranthene (between 298 and 338 K) and vapor pressures of phenanthrene and fluoranthene (between 300 and 470 K) were measured.From aqueous solubility data coupled with the vapor pressures of the pure solutes, partition coefficient air-water, KAW, and Henry's constant, KH, of environmental relevance were calculated.

Comparison of vapor pressures of 4 PAHs from top: phenanthrene, fluoranthene, 1,2,3,4-DBA and 1,2,5,6-DBA.44