Thermodynamic properties of hyperbranched polymer, Boltorn BW3000, were investigated by inverse chromatography with 42 different solvents: alkanes (C(5)-C(10)), cycloalkanes (C(5)-C(8)), alkenes (C(5)-C(8)), alkynes (C(5)-C(8)), aromatic hydrocarbons (benzene, toluene, ethylbenzene, o-, m-, p-xylene, thiophene), alcohols (C(1)-C(5)) and water, ethers (diethyl-, di-n-propyl-, di-n-butylether, methyl-tert-butylether, MTBE, tetrahydrofuran, THF), and ketones (propanone, 2-pentanone, 3-pentanone, 2-hexanone, 3-hexanone, cyclopentanone) at the temperatures ranging from (308.15 to 348.15) K. The density and thermophysical properties of polymer were described. The specific retention volume (V(g)), the mass-fraction activity coefficient at infinite dilution (Omega(infinity)(13)), the Flory-Huggins parameter (chi(infinity)(13)), the molar enthalpy of solute's absorption in the polymer (Delta(s)H), the partial molar excess enthalpy at infinite dilution (Delta H(1)(E infinity)), the partial molar Gibbs excess energy at infinite dilution (Delta G(1)(E,infinity)), and the solubility parameter of the polymer (delta(3)) were calculated.