The solubility of 3-nitrophthalic acid in water, methyl acetate, ethyl acetate, butyl acetate, ethyl formate, tetrahydrofuran, acetone, and 1,4-dioxane between 278 K and 353 K were measured using a laser monitoring observation technique. Results of these measurements were correlated with a semi-empirical equation. For the eight solvents studied, the data are well fitted with a semi-empirical equation.