Abstract: Study on Main Products and By-Products in Synthesis Methyl, 2-Cyclohexanedicarboxylic AnhydrideZhu Peifen; Wu Wannian; Sha Huixin; Shi Xinmei(Analysis and Rresearch Centre,East China University of Science & Technology,Shanghai 200237,China)Qi Hedi(Shanghai Jinshan Petroleum Chemical Academy)Abstract:Synthesis products of methyl, 2-cyclohexanedicarboxylic anhydride as well as 11 compounds were determined by GC/MS. Furthermore, the reasons of by-products generation were also studied.Keywords: methy, 2-cyclohexanedicarboxylic anhydride,GC/MS,analysis