Using the static analytical method, the solubility of 1,2,4-benzenetricarboxylic acid in binary acetic acid + water solvent mixtures has been measured. The experimental temperatures range from (313.2 to 363.2) K, and the mole fractions of acetic acid in the solvent mixtures range from 0.416 to 1.000. The experimental solubilities were correlated by the Apelblat equation.