Rudong Zhenfeng Yiyang Chemical Co., Ltd. is located on the coast of the South Yellow Sea-Huanghai 1st Road, Chemical Industrial Park, Rudong County Coastal Economic Development Zone, near Shanghai and Suzhou, with convenient water, land and air transportation. After nearly 50 years of development, it now has the production capacity of 10,000 tons of phosphorous acid, 5,000 tons of phosphite and 1,000 tons of tetramethylammonium hydroxide. It has a national industrial product production license and has passed the ISO9001 quality system certificatio...