Zinc Sulfate is an inorganic compound and dietary supplement.
As a supplement it is used to treat zinc deficiency and to prevention the conditions in those at high risk.
In medicine it is used together with oral rehydration therapy (ORT) and an astringent.
The hydrates, especially the heptahydrate, are the primary forms used commercially. The main application is as a coagulant in the production of rayon. It is also a precursor to the pigment lithopone.
It is used as in electrolytes for zinc plating, as a mordant in dyeing, as a preservative for skins and leather.
Zinc sulfate is used to supply zinc in animal feeds, fertilizers, toothpaste, and agricultural sprays. Zinc sulfate, like many zinc compounds, can be used to control moss growth on roofs.
Zinc sulfate can be used to supplement zinc in the brewing process. Zinc is a necessary nutrient for optimal yeast health and performance. Although not necessary for low gravity beers as the grains commonly used in brewing already provide adequate zinc.
Zinc sulfate powder is an eye irritant. Ingestion of trace amounts is considered safe, and zinc sulfate is added to animal feed as a source of essential zinc, at rates of up to several hundred milligrams per kilogram of feed. Excess ingestion results in acute stomach distress, with nausea and vomiting appearing at 2-8 mg/Kg of body weight.
Brand Name: Examples include Orazinc and Zincate
Source: Drugs.com, https://www.drugs.com/cdi/zinc-sulfate.html