The d. of satd. aq. solns. of K2SO4 with concns. 10.7-14.5% by mass was measured sep. under thermostatic conditions at temps. near their satn. The d. of soln. in unsatn. range was described as a linear function of temp. Furthermore, the results revealed existence a sp. point with allows calcn. of satn. temp. of soln. based on a single d. measurement at any temp. below the satn. point.