... :CP/BP/USP/EP,ISO,GMP Poly Ferric Sulfate (pfs) 1.Name: Poly Ferric Sulfate2.Cas ... Standard:CP/BP/USP/EP,ISO,GMP Poly Ferric Sulfate (pfs)Appearance: Yellow powderFe(3+): >20%;Basicity%: ... 14.0% Insoluble material%: <0.5%Poly Ferric Sulfate (pfs) PFS is an inorganic high molecular flocculant, ... in Ex-stage of drinking water.Polymeric Ferric Sulfate have great adaptability to acidity of source water, ...