Copper nitrate hydrate, along with ammonium nitrate, can be used to prepare p-type semiconductor CuO films (bandgap energy of 1.4 eV). It can catalyze oxidative coupling of 2,6-dimethylphenol to produce a polymer which is an important engineering material.
It serves as a catalyst for oxidative coupling of 2,6-dimethylphenol, resulting in an important engineering polymer material. Also used in textiles and polishing agents for other metals. It is a precursor for copper oxide, which finds use as a catalyst for many organic transformations. Menke conditions employ copper nitrate for aromatic nitrations. Claycop reagent, the hydrated copper nitrate deposited on clay, finds use in many organic reactions, for example, oxidation of dithioacetals to carbonyls and thiols to disulfides.