Application:used in feed, preserves, waste water treatmentand water purity, disinfection, rubber, leather,washingpowder, livestock feed, pencils.shelf life:one yearStorage & handling:Store the product in a cool and dry place,avoid contact sunshine ,water and moisture,avoid contact with strong acid,oxidants or poisonous substances.Exposure to moisture will make it oxidzeeasily to sodium sulphate . Not store it for a long time . Product Specification:ITEMFeSO4.H2OFeSO4.7H2OFeSO4> 91%> 98%IRON> 30%> 19.68%PB< 0.002%< 0.002%AS< 0.0002%< 0.0003%