Copper sulfate is used in livestock primarily as a trace‑mineral supplement to support enzyme function, immunity, growth, and red blood cell formation — but it must be used carefully because the margin between deficiency and toxicity in ruminants is narrow.
Copper sulphate is also a highly versatile compound used as a fungicide, algaecide, soil additive, molluscicide, and mineral supplement across agriculture and industry. Its usefulness comes from its strong reactivity, solubility, and ability to supply copper as a micronutrient.