Аннотация:The effective catalytic system based on Fe(III) and surfactants for hydroxylation of benzoic acid with hydrogen peroxide in aqueous medium under 30-80 C has been suggested. The optimum conditions of the reaction depending on temperature and Fe(III) concentration have been defined. It has been established that 0,1-0,15 mmol Fe(III) concentration provokes the most effective oxidation of benzoic acid.