Tin(II) oxide, also known as stannous oxide, is a chemical compound with the formula SnO. It consists of tin in the +2 oxidation state and oxygen. This compound appears as a white to light yellow powder and is used in various applications, including ceramics, glass, and as a pigment. In addition to its industrial uses, tin(II) oxide is also studied for its potential in electronics and as a catalyst in chemical reactions. It can be produced through the reduction of tin(IV) oxide or by heating tin in the presence of oxygen.