1,2,4,5-Cyclohexanetetracarboxylic acid dianhydride

1,2,4,5-Cyclohexanetetracarboxylic acid dianhydride (CAS 2754-41-8) is manufactured directly by Qi-Chem Co., Ltd. to pharmaceutical grade under the company's enterprise standard. Qi-Chem, founded in 2010 and based in Dalian, is a custom synthesis and toll manufacturer specializing in pharmaceutical and agrochemical intermediates and fluorine chemistry, recognized as a National High-Tech Enterprise; the product is sold into North America, Western Europe, Eastern Europe and Asia.