... sulphate Appearance: grey granular or powder Fe: 30% min. Our company produce high quality sulphate salts, such as Ferrous sulphate Mono / Hept, Manganese sulphate ... mono, Zinc sulphate mono / Hept., etc. Ferrous Sulphate Monohydrate ... inner linner We produce Ferrous sulphate Hept., Ferrous sulphate Mono Granular too.Pls feel ...