Zinc Sulfate Bon Conservateur No known benefits Zinc Sulfate at a glance Created through the reaction of sulfuric acid and zinc oxide Has stabilizing and preservative properties Conflicting research surrounds its anti-acne capabilities Ruled safe as used in cosmetics Zinc Sulfate description Chemical compound resulting from the interaction of zinc with sulfuric acid. There is little research showing this to be beneficial for skin. The information that is available shows that it can be a skin sensitizer when used in large amounts. A small amount of zinc sulfate is sometimes used in high-strength vitamin C treatments to stabilise the vitamin C (typically seen on the ingredient list as ascorbic acid). In these instances, the zinc sulfate is unlikely to be a source of skin sensitivity. Related ingredients: Sulfuric Acid Zinc Oxide