1)Zinc Sulfate Heptahydrate Food Grade 2)Zn :22.8%,22.51% ... Min 4)Appearance:White crystal powder,granular Food Grade Zinc Sulfate Heptahydrate 1) Physical and chemical property:Molecular formula ZnSO4 ... with pallet will be loaded in 1*20’fcl container. 5)Storage:Store in cool and ventilated place ,keep away ... heat and sunshine, sealed package. Stay away from oxide Zinc Sulfate Heptahydrate Food Grade