Changzhou Qishuyan Fine Chemical Co., LTD. Founded in 1992 which is specialized in producing phosphorus pentoxide and polyphosphoric acid with a complete of equipments and testing instruments covers an area of 10000 m2 and more. The enterprise locates at Qishuyan district of Changzhou City. It has staff and members of more than 60 persons including three professional persons. At present, its annual production capability has reached above 10000 tons. The products for industrial grade and reagent grade comply with the requirements of all the customers.