By the methods of physicochemical analysis (DTA, RFA, MSA, as well as measurement of microhardness and density) was investigated the nature of the chemical interaction in the system (SnTe)1-x(Ag2Te)x (x=0.01, 0.02, 0.05). It was found that solid solutions based on SnTe at room temperature extend to 5 mol % Ag2Te. For alloys of solid solutions containing 1, 2 and 5 mol % Ag2Te were studied the electrophysical and thermal properties depending on the content. For the alloys of 1, 2, and 5 mol % of Ag2Te, the temperature dependences of the electrical conductivity have a metallic character. It was found that a decrease in the carrier concentration in the samples under study gives grounds for assuming that partial compensation of charge carriers occurs during the transition from SnTe to solid solutions (SnTe)1-x(Ag2Te)x.