Beijing Chemder Co. Ltd

Beijing chemder co.,Ltd. set up in 2004.We have been engaging in researching new chemical technologies and selling new products.Now we supply 4-chlorophthalic anhydride (CAS:118-45-6)in the purity of 99.0%,which is mainly used to synthesis biphenyltetracarboxylic di-anhydride ,one of the most important materials of polyimide. [详细介绍]