A new spectrophotometric method for determination 3, 5-Dinitro-o-toluic acid. It is based on the coloring reaction in base medium.

• 基于芳族二硝基衍生物在碱性介质中能还原成有色的阴离子，建立了3，5-二硝基邻甲基苯甲酸的分析方法。