Ferric oxide, chemical formula Fe₂O₃. Also known as burnt limonite, burnt ochre, iron red, iron red, red powder, Venice red (the main component is iron oxide), etc., it is easily soluble in strong acid, medium strong acid, and its appearance is reddish brown powder. Its reddish brown powder is a low-grade pigment, industrially called iron oxide red, used in paint, ink, rubber and other industries, as a catalyst, a polishing agent for glass, gems, and metals, and as a raw material for ironmaking.
Iron oxide is the main component of rust. The main cause of rust is that iron metal reacts with moisture and oxygen in the environment in the presence of impurity carbon, and iron metal will rust. Used in paint, ink, rubber and other industries, it can be used as a catalyst, a polishing agent for glass, gems, and metals, and can be used as a raw material for ironmaking. The biggest application of iron oxide is as a pigment. According to the color, it is divided into iron oxide red, iron oxide yellow, and iron oxide black. Iron oxide brown is a mixture of iron oxide red and iron oxide black (and iron oxide yellow); iron oxide orange is a mixture of iron oxide red and iron oxide yellow The iron oxide green is a mixture of blue phthalocyanine blue and iron oxide yellow.
Stability: stable, soluble in hydrochloric acid and dilute sulfuric acid to generate iron salt. Elemental iron generates ferrous ions in the substitution reaction.
Storage and transportation conditions: Store in a dry place, keep away from moisture, avoid high temperature, and isolate it from acids and alkalis. According to the above storage conditions, the effective storage period of the unopened product is three years. Solubility: hardly soluble in water and does not react with water. It is soluble in acid and reacts with acid. Does not react with sodium hydroxide. Iron oxide reacts with acid to form iron salt and water. Example: Thermite reaction Aluminium and iron oxide are mixed to form the thermite agent, which is heated to produce alumina and iron.
Carbon and carbon monoxide reducing iron oxide can be mixed with carbon and heated to extract iron and carbon dioxide.
