3,4-Diaminobenzoic acid is an organic compound that has two amine groups (NH2) of the benzene ring and a carboxylic group (COOH) [1]. This organic compound behaves differently in acidic and alkaline conditions [2]. This compound is used as a reagent in the synthesis of coumarin and anti-inflammatory drugs and other drugs [3]. Since the electrochemical behavior of this compound has not been investigated so far, in this project, the electrochemical oxidation of 3,4-Diaminobenzoic acid was investigated by cyclic voltammetry technique in different ratios acetonitrile/buffer with different scan rates. It was observed that this substance exhibits different behavior at Different percentages of solvent. For further investigation, this test was repeated with ethanol solvent and obtained the same results and only changes were observed in the voltammograms. Since 3,4 -Diaminobenzoic acid is soluble in water, water was used as the proper solvent in the experiments. The effect of pHs on 3,4-Diaminobenzoic acid was investigated to. The result show that in acidic and alkaline environments the shape of the voltammograms is are different and the potential of peak is shifted. For example, the peak potential when using a buffer at pH = 5 is 0.31, while in a buffer at pH = 11, the potential is obtained as 0.071. The coulometry of this substance was done. The available evidence showed that after the electrochemical reaction, a chemical reaction is taking place and a new substance is synthesized. The structure of the new substance was identified by 1H NMR- 13C NMR- MSFTIR.
