... : 99%, 98% 3.7-12days delivery 4.Mainly used in feed/ food additive zinc sulfateZnSO4 is a colorless crystalline, water-soluble ... 26 (00) Usage: It is used to supply zinc in animal feeds, fertilizers, and agricultural sprays. ZnSO4·7H2O is used in ... , no contact with acid and alkali and color matter. for animal feed grade zinc sulfate