Zinc sulfate heptahydrate wani fili ne na inorganic tare da tsarin kwayoyin halitta na ZnSO4 7H2O, wanda aka fi sani da alum da zinc alum.Launuka orthorhombic prismatic crystal zinc sulphate lu'ulu'u Zinc Sulfate Granular, farin crystalline foda, mai narkewa a cikin ruwa, dan kadan mai narkewa a cikin ethanol.Yana rasa ruwa idan ya zafi zuwa 200 ° C kuma ya rube a 770 ° C.