D., b.p., water soly. and viscosity of the hydroxyester were detd. exptl. as well as by using a specialized computer software based on the quant. relationship between chem. structure and chem. activity to cf. the results obtained by both methods. The computer software was successfully used to det. d. and b.p. for which the relative errors were 2.9 and 2.1%, resp. In contrast, the conformity of water soly. and viscosity was not good enough and the relative errors exceeded 50%.