Iron(III) oxide, also known as rust, is a reddish substance, an iron oxide. It has a chemical formula of Fe2O3.
The production of iron, steel, and many alloys is the biggest use of iron.
Iron(III) oxide is also used as a pigment for use in cosmetics. Iron oxides are used as pigments in dental composites too.
Hematite is the characteristic component of the Swedish paint color Falu red.
Iron(III) oxide was the most common magnetic particle used in all types of magnetic storage and recording media, including magnetic disks (for data storage) and magnetic tape (used in audio and video recording as well as data storage). Its use in computer disks was superseded by cobalt alloy, enabling thinner magnetic films with higher storage density.
Iron(III) oxide Facts for Kids. Kiddle Encyclopedia.