Copper sulphate is a chemical compound that is widely used in various industries, such as agriculture, pharmaceuticals, and electronics. It is commonly known as blue vitriol, bluestone, or cupric sulphate. Blue vitriol refers to its distinctive blue color, while bluestone comes from its use as a fungicide for plants. Cupric sulphate is simply another name for copper sulphate. Other synonyms for copper sulphate include copper sulfate pentahydrate, copper sulfate anhydrous, and copper (II) sulphate. Despite their different names, they all refer to the same chemical compound with the formula CuSO4.