Cobalt(II) nitrate, represented by the chemical formula Co(NO3)2, is an inorganic compound composed of cobalt, nitrogen, and oxygen. It typically appears as a blue crystalline solid and is soluble in water. This compound is often used in laboratories and industrial applications, including the production of cobalt salts and as a catalyst in various chemical reactions. In its hydrated form, cobalt(II) nitrate can exist as Co(NO3)2·6H2O, which contains six water molecules. It is important to handle this compound with care, as it can be harmful if ingested or inhaled. Cobalt(II) nitrate is also used in the preparation of pigments and in the manufacture of ceramics.