The solubility, density, and refractive index data for 1,2-propanediol + Cs2SO4 + H2O, ethylene glycol + Cs2SO4 + H2O, and glycerin + Cs2SO4 + H2O ternary systems were determined at 15 degrees C, 25 degrees C, and 35 degrees C. In all cases, the solubility of Cs2SO4 in aqueous solutions decreased significantly due to the presence of the polyhydric alcohol. The experimental density, refractive index, and solubility data of saturated solutions for these systems were correlated using polynomial equations. Furthermore, the refractive index and density of unsaturated ternary solutions were also determined and correlated with salt concentrations and proportions of polyhydric alcohol in these systems.