Polymeric ferric sulfate referred to as PFS, is a new type of highly efficient inorganic polymer flocculant. Solid is light yellow amorphous powder. Solid products have a strong moisture absorption. PFS / poly ferric sulfate cohesion performance, chemical stability, sedimentation speed. Applicable to a wide range of PH value, PFS / poly ferric sulfate can be widely used in drinking water, a variety of industrial water, industrial wastewater, urban sewage purification.