PFS is a kind of inorganic macromolecular coagulant with superior properties. Its morphological properties are light yellow amorphous powdery solid, easily soluble in water. The *0% (mass) aqueous solution is reddish-brown transparent solution with hygroscopicity.Polyferric sulfate is widely used in the purification of drinking water, industrial water, various industrial wastewater, municipal sewage, sludge dewatering, etc.