Abstract: The solubility of substance is depends on temperature and interaction of solute-solvent with its dissociation in ionic form as ionic strength of acid at different pH, where their partitioning (K) are observed between two immiscible liquid-liquid solvents system. Presently, we have been reported to benzoic acid for these solubility as well as its partitioning study at different pH between in hydrophilic aqueous water and hydrophobic organic benzene layers at room temperature (25°C). Here, the benzoic acid are distributed between such solvent by applying shake-flask method and by titrimetrically, there equilibrium concentration in both solvents are analyzed. The solubility of benzoic acid and it partitioning between water and benzene buffer solution at different pH range as 4.0, 7.0 and 9.0 have been studied well.