Widely used in agriculture as a fungicide and pesticide, especially in vineyards and orchards to control fungal diseases like mildew and blight. It is a key component of Bordeaux mixture, a traditional spray for protecting plants. In addition, it serves in root pruning and as a supplement in animal feed to prevent copper deficiency. Commonly used in industrial applications such as electroplating, where it provides a source of copper ions for depositing metallic copper onto surfaces. It is also employed in metal finishing, printing, and as an electrolyte in batteries and copper refining processes. In water treatment, it is applied to control algae growth in reservoirs, ponds, and swimming pools due to its algaecidal properties. However, its use is regulated to avoid toxicity to aquatic life. Used in educational and laboratory settings for crystal growth experiments and as a reagent in qualitative inorganic analysis. It also finds use in the preparation of other copper compounds and in school chemistry demonstrations involving displacement reactions or hydration studies.