SnO, or tin(II) oxide, is a chemical compound composed of tin and oxygen. It appears as a white or light yellow powder and is primarily used in ceramics, glass, and as a pigment. SnO can also serve as a semiconductor in electronic applications due to its ability to conduct electricity under certain conditions. In nature, SnO can be found in minerals such as cassiterite, which is an important ore of tin. The compound is also studied for its potential use in catalysis and as a protective coating in various industrial applications.