Used as a reagent in analytical chemistry for the detection and estimation of reducing sugars and other reducing substances. Serves as a catalyst in organic synthesis reactions, particularly in oxidation processes. Employed in electroplating baths to deposit copper coatings with fine grain structure and improved adhesion. Utilized in the preparation of other copper-based compounds and in some formulations for nutritional supplements where copper fortification is needed. Also finds use in educational laboratories for demonstrating coordination chemistry and redox reactions.