Ni(NO3)2, or nickel(II) nitrate, is an inorganic compound composed of nickel, nitrogen, and oxygen. It appears as a blue-green crystalline solid and is highly soluble in water. This compound is often used in various applications, including as a catalyst in chemical reactions and in the production of nickel salts. In addition to its industrial uses, Ni(NO3)2 is also utilized in laboratories for research purposes. It can serve as a source of nickel ions in solutions, which are important for studying the properties of nickel and its compounds. Proper handling and storage are essential due to its potential hazards.