The partition,of benzene and biphenyl in organic solvent-water systems was studied at a temperature of 20 +/- 1 degreesC. The solubility of hexamethylbenzene, p-terphenyl, and 1,3,5-triphenylbenzene in solvents of various natures and polarities (hydrocarbons and their halogenated derivatives, alcohols, ketones, ethers, and esters) was determined at this temperature. The Gibbs free energies of the transfer of aromatic hydrocarbons from the n-octane to the solvents were calculated. The additivity of the transfer free energies was found, and a correlation equation for calculating of the transfer free energies for aromatic hydrocarbons of different structures and molecular weights was proposed. It was found that halogenated hydrocarbons, benzene, ketones, and esters have the highest solvating power with respect to aromatic hydrocarbons, and alcohols, aliphatic hydrocarbons, and ethers have the lowest solvating power.