Tianjin Castle Chemicall trading Co.,Ltd was established in 2007,which is a synthetic and modern chemical enterprise gathering manufacture and sales. The company is located in the west of Tianjin port,China, Our business covers Leather,Dyes,Rubber,Food,Pharmaceutical,Pesticide,and Minerals,etc.　　Our main products including:sodium hexametaphosphate(shmp), sodium formate, sodium gluconate,sodium sulphide,ammonium sulphate....