Mixture of thioglycolic acid(TGA) and dithioglycolic acid(DTDGA) was synthesized by the method of sodium thiosulfate,and used as raw materials to prepared TGA by further electroreduction of DTDGA.

• 以硫代硫酸钠法合成的巯基乙酸(TGA)和二硫代二乙酸(DTDGA)混合物为原料,研究了DTDGA电还原制备TGA的工艺条件对DTDGA转化率、TGA收率和电流效率的影响规律。