Rudong Zhenfeng Yiyang Chemical Co., Ltd., whose predecessor were Rudong Synthetic Chemical Factory which set up in 1974, is one of the main producers of Phosphorous Acid for Export in China and is located in the eastern coast of the south Yellow Sea and the northern side of the Yangtze River, near Shanghai, Wuxi and Suzhou cities. Main Products are including Phosphorous Acid, Monopotassium phosphite, Tetramethylammonium hydroxide, Amino, tris(methylene phosphoni...