Used as a catalyst in organic synthesis, particularly in coupling reactions such as Ullmann-type reactions for forming carbon-heteroatom bonds. Employed in electroplating processes to deposit copper coatings on various substrates, enhancing conductivity and corrosion resistance. Applied in textile industry as a dye fixative and colorant, especially for natural fibers like cotton and wool. Utilized in wood preservation formulations to protect against fungal decay and insect damage. Serves as a fungicide and bactericide in agricultural applications, controlling plant pathogens in crops. Commonly used in educational laboratories for demonstrating redox reactions and coordination chemistry. Also found in some pigment formulations for paints and coatings due to its stable greenish-blue color.