Used as a catalyst in organic synthesis, particularly in coupling, oxidation, and chlorination reactions. Employed in electroplating processes to deposit copper coatings on metals, creating corrosion-resistant surfaces. Serves as a precursor in the production of other copper compounds and pigments. Applied in agricultural chemicals as a fungicide for certain crops and as a trace mineral supplement in animal feed. In water treatment, used as an algaecide, to remove sulfides in wastewater, and as a disinfectant in water systems. Also utilized in the textile industry for dyeing and printing fabrics, and in the manufacture of batteries and printed circuit boards.