ferric water treatment agent

We are the biggest manufacturer of ferric sulphate in China,and our ferric sulphate is certified by ISO9001-2000,and was certified by NSF in 2006-2008,but we stopped NSF certification in 2009,because the economic situation of world,but the quality is same as before. We have been exported our ferric sulphate for about 9 years, Our ferric sulphate is being exported to many countries ,and our domestic and oversea customers give it high honor. Our ferric sulphate usually is used in mine ,coak plant,steel plant,power plant,oil field,life waste water and other waste water treatment ,and drinking water treatment. The specification of our ferric sulphate as follow: - Appearance : yellow powder Solubility: Readily soluble in water - Form : Dry in form & fairly uniform in size - Formula : Fe2(SO4)3. XH2O, X is 4-6. - Fe3+ content : More than 21.5% (m/m) Fe2+ content : 0.10% max Water insoluble material: Less than 0.3% of Ferric Sulphate to be insoluble in water. - Acidity : pH of 1% water solution shall be 2-3 Package:25 kg p/p bags or 600kg bags