Iron oxide, also called ferric oxide is an inorganic compound with the chemical formula Fe₂O₃. It occurs in nature very abundantly and is widely distributed. It is a chemical complex which occurs naturally comprising iron and oxygen. Iron oxide is vital to humans and useful in most geological and biological activities. This iron oxide may be required for investigations of its own particular properties or used as starting materials for other processes.

Properties of Iron oxide

Chemical Formula : Fe₂O₃

Appearance : Red-brown solid

Density : 5.24 g/cm³

Molecular Weight/ Molar Mass : 159.69 g/mol

Boiling Point : 3414 °C

Melting Point : 1565 °C

Odour : Odourless

Solubility : Insoluble in water, soluble in strong acid

Uses of Iron oxide

The ordinary black iron oxide has been used in both copperplate and dye stamping inks.

Oxides of iron constitute the main component of products in the pharmaceutical industry, paint industry, plastic industry, ink industry and cosmetic industry.

Used as a pigment of natural origin including titanium dioxide.

Its salt is used as a flocculant in wastewater treatment the dyeing of textiles and the production of fertilizer and feed additives.

Used as a polishing material in the jewellery trade.