How to Dispose of Copper Sulfate | Hunker
How to Dispose of Copper Sulfate By John Brennan. SAVE; Copper sulfate pentahydrate is a blue compound that forms striking blue crystals and dissolves readily in water. It's often used in agriculture, especially as a pesticide, soil additive and feed additive. It's also used in the manufacture of other copper compounds and in electroplating baths.