iron(III) oxide

Iron(III) oxide, commonly known as rust, is a reddish-brown compound formed when iron reacts with oxygen in the presence of water or moisture. It plays a significant role in both nature and industry. In nature, it contributes to the Earth's soil and is found in minerals. In industry, iron(III) oxide is used as a pigment in paints and coatings, in the production of ceramics, and as a catalyst in various chemical reactions. While it’s a common sight in rusty objects, it indicates a chemical change that leads to the deterioration of metals.