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Iron oxide are chemical compounds composed of iron and oxygen. There are sixteen known Iron oxide and oxyhydroxides.

Iron oxide and oxide-hydroxides are widespread in nature, play an important role in many geological and biological processes, and are widely utilized by humans, e.g., as iron ores, pigments and catalysts in thermite. Common rust is a form of iron(III) oxide. Iron oxdes are widely used as inexpensive, durable, pigments in paints, coatings and colored concretes. Colors commonly available are in the “earthy” end of the yellow/orange/red/brown/black range.

Iron(III) oxide or ferric oxide is an inorganic compound with the formula Fe₂O₃. It is one of the three main oxides of iron. As the mineral known as hematite, Fe₂O₃ is the main source of the iron for the steel industry. Fe₂O₃ is ferromagnetic, dark red, and readily attacked by acids. Iron(III) oxide is often called rust. To some extent this label is useful, because rust shares several properties and has a similar composition. To chemists, rust is considered an ill-defined material, described as hydrated ferric oxide.

The overwhelming application of Iron(III) oxide is as the feedstock of the steel and iron industries, e.g. the production of iron, steel, and many alloys.

This article comes from thechemco edit released