Copper sulfate, also known as cupric sulfate, is a chemical compound with the formula CuSO4. It has a bright blue color and is widely used as an herbicide, fungicide, and pesticide. The compound exists in different forms depending on its degree of hydration.
Copper sulfate is a crystalline, odorless powder that absorbs water well. In its anhydrous form, it is white, but it turns blue when combined with water molecules.