... : Poly ferric Sulfate Certificate: ISO9001:2000,SGS InspectionOur ferric sulphate usually is used in mine ,coak plant,steel plant,power ... treatment ,and drinking water treatment.The specification of our ferric sulphate as follow:- Appearance : yellow powder Solubility: Readily soluble in ... m) Water insoluble material: Less than 0.3% of Ferric Sulphate to be insoluble in water.- Acidity : pH of 1% ...