... , taste salty. Easily airslake in dry air, 1,Chemical Name: FERROUS SULFATE2,Molecular Formula : FeSO4·7H2O3,Molecular Weight: 74.54,CAS ... , it is easy to oxidize to brown yellow alkalescence ferric sulphate. Soluble in water, insoluble in ethanol.6,Usage: It is ... (FeSO4·7H2O)≥%99.5~104.5Lead≤%0.0002Mercury≤%0.0001 ferrous sulphate -food additives