Widely used in agriculture as a component of Bordeaux mixture, a fungicide applied to crops like grapes and potatoes to prevent fungal diseases. Also used in the formulation of pesticides and herbicides due to its biocidal properties. Commonly employed in electroplating processes, where it serves as a source of copper ions for depositing a uniform copper layer onto metal surfaces, improving conductivity and corrosion resistance. Used in educational laboratories for crystal growth experiments and as a reagent in various chemical reactions, including displacement and redox reactions, due to its vivid blue color and reactivity. Applied in mining and metallurgy for the extraction of metals through froth flotation processes, where it acts as an activator for sulfide minerals. Utilized in water treatment to control algae growth in reservoirs, ponds, and swimming pools, though its use is regulated due to environmental toxicity concerns. Found in the textile industry for dyeing processes, particularly in the production of certain pigments and as a mordant to fix dyes to fabrics. Used in the preparation of other copper compounds and in analytical chemistry for qualitative testing of proteins and reducing sugars.