Chongqing ChangFeng Chemical Co.,Ltd. is a leading manufacturer of high performance chemicals that use phosgene and aromatic amines as main intermediates. A major phosgene derivative production base, we share the largest capacity for phosgene production in China and offer a variety of products. We are proud to be one of the world's largest manufacturers of Benzophenone, production of which uses the highly efficient phosgene-based process, with a current annual capacity of 5000 metric tons and expansion efforts underway. Other top-selling products include Ethyl Centralite, Methyl Centralite, Diphenyl Carbonate, Tetramethylurea, Tetrabutylurea, and others. ChangFeng Chemical is located in an area rich in natural gas, our factory possesses state-of-the-art natural gas conversion/separat..