... high purity,easily soluble 2.Cost-effective,efficent water treatment 3.Move COD ,BOD & heave metal Ferric Sulphate ... standard for ferric sulfate, please refer to the national standard of <water purifying agent--polyferric sulfate>, PRC.ItemIndexIron Content,% >20Reductive ... , mainly used to purify and treat all kinds of drinking water, industrial water, wastewater and sewage. Moreover, it can be ...