Cobalt sulfate is a chemical compound used in batteries, electroplating, and as a nutrient in animal feed. It appears as red-pink crystals and plays a key role in rechargeable batteries. https://www.noahchemicals.com/product/cobalt-ii-sulfate-heptahydrate-reagent-crystal-cobaltous-sulfate-heptahydrate-coso%e2%82%84-7h%e2%82%82o/