Zinc Sulfate is known as an inorganic compound with the formula ZnSO4 in addition to any of three hydrates. Throughout history, it was known as "white vitriol." All of the many forms are neutral solids. The heptahydrate is frequently encountered. Zinc Sulfate is on the WHO Model List of Essential Medicines, which is a directory of the most potent medications required in a basic health system. The hydrates, principally the heptahydrate, are the main forms that are used commercially. The primary application is as a coagulant as it pertains to the production of rayon. It’s also a precursor to the pigment lithopone. Zinc sulfate is used to supply zinc in fertilizers, animal feeds, and agricultural sprays. Zinc sulfate, like many other zinc compounds, can be utilized to control moss growth on roofs. It is used as a mordant in dyeing, in electrolytes for zinc plating, as a preservative for leather and skins, and in medicine as an emetic and astringent.