Copper sulfate is an inorganic compound. Anhydrous copper sulfate is a gray white powder, which can easily absorb water and turn into blue-green copper sulfate pentahydrate. Copper sulfate is not only a fertilizer, but also a widely used fungicide.

Copper sulfate is not only a fertilizer, but also a widely used fungicide. Bordeaux solution, copper soap solution and cupric ammonium preparation are prepared with copper sulfate, lime milk, soap and ammonium bicarbonate.