The emfs of cells without-junction Pt,H~2(g,p^0)|HCl(m~E)|AgCl-Ag; Pt,H~2(g,p^0)|HCl(m~E),PG(m~N)|AgCl-Ag have been measured at 10 degree intervals from 278.15 to 318.15K, where PG refers to 1, 2- propanediol, m~E=0.005-0.1mol.kg^-^1, m~N=0.4-1mol.kg^-^1. The emf data were used to calculate salting constant k~s for HCl+PG+H~2O system and thermodynamic parameters of pair interaction, f~E~N(g~E~N, s~E~N, h~E~N and c~P~,~E~N) between HCl and PG in water. It has been shown that k~s>0, g~E~N>0, s~E~N>0, h~E~N>0 and c~P~,~E~N<0. The signs of these parameters and the temperature dependence of them have been interpreted by the model of structural interaction.

Key words: PROPANEDIOL, HYDROCHLORIC ACID, THERMODYNOMICS PARAMETER, SALT EFFECT