The solubilities of 2-isopropylthioxanthone (ITX) in methanol, toluene, ethanol, acetone, ethyl acetate, 1,4-dioxane, and 1,2-dichloroethane were determined at temperatures ranging from (299.15 to 329.85) K under atmospheric pressure by employing the synthetic method. The solidliquid equilibrium of the mixture was detected by a laser monitoring observation technique and found to increase with an increase in temperature. The experimental solubilities were correlated by the modified Apelblat and ?h equations. The modified Apelblat equation fits well with the experimental data with the relative deviation less than 2.86 %. The standard enthalpy and standard entropy of the solution of ITX in different solvents were obtained by vant Hoff equation together with the modified Apelblat model.