Copper(II) oxide is insoluble in water and different types of alcohols. This compound is soluble in solutions of strong acids and in hot acids, such as formic or acetic acid. It can also dissolve in an ammonia solution, but it does so at a very slow rate.
Copper(II) oxide is an odorless and solid substance that is brownish-black in appearance. This compound is known by other names, such as oxocopper, cupric oxide and copper oxide. Its molecular weight is 79.54 grams per mole, and its chemical formula is CuO.
Cupric oxide does have strong reactions when heated with boron and titanium. However, heating sodium and cupric oxide causes a reduction of cupric oxide.