Zinc sulfate heptahydrate can also named zinc vitriol, and the content of our product is 21.5%. The zinc sulfate heptahydrate is widely used for sterilization and the Pesticide. It can also used in making lithopone, in coagulation baths for rayon, in electrolytes for plating, as a mordant in dyeing, as a preservative for skins and leather and in medicine as an astringent and emetic. Identifiers CAS number 7446-20-0 HS Code 2833293000 UN number 3077 Applications: 1. Used as an emetic and disinfectant in pharmaceuticals, feed. 2. As preservative for wood and leather protect. 3. Used in ceramics, electroplating, chemical fiber and basic materials of chemical products. etc.