What is vanadium (ii) oxide formula?

Vanadium (II) oxide has the chemical formula VO. It is a dark blue or gray solid that is insoluble in water. It is a reducing agent and can be used as a catalyst in certain chemical reactions. Vanadium (II) oxide is also known as vanadium monoxide and has a molar mass of 66.94 g/mol. Its melting point is 1,740 °C and it has a density of 5.84 g/cm³. This compound is relatively unstable and is easily oxidized in air.