Ferrous Sulphate monohydrate heptahydrate - Fe: 19% min or 19.5% min Pb: 15ppm max Cd: 10ppm max As: 5ppm max - Size: -20 mesh green crystalline - Intendedforuseinthefollowingapplications: fertilizer, feed premix,cement industry or water treatment - We'dbegladtoworkwithcustomersfornewapplication.