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| General | |
|---|---|
| Name | Iron (III) oxide |
| Chemical formula | Fe2 O3 |
| Appearance | Red powder |
| Physical | |
| Formula weight | 159.7 amu |
| Melting point | 1838 K (1565 °C) |
| Density | 5.2 ×10³ kg/ m³ |
| Crystal structure | Corundum |
| Solubility | insoluble |
| Thermochemistry | |
| ΔfH0liquidThe standard enthalpy of formation of a compound is the change of enthalpy that accompanies the formation of 1 mole of that substance from its component elements, at their standard states (the most stable form of the element or compound at 25 degrees Cels | ? kJ/mol |
| ΔfH0solid | |
| S0liquid, 1 barIn chemistry, the standard molar entropy is the entropy content of one mole of substance, under conditions of standard temperature and pressure. By comparing the entropies of products and reactants in a chemical reaction, we can determine whether the reac | ? J/mol·K |
| S0solid | 87 J/mol·K |
| Safety | |
| Ingestion | Extremely large or sustained doses may cause iron poisoningIron poisoning is caused by an excess of iron in the blood. It is a common cause of death in young children who consume large quantities of iron supplement pills, which resemble sweets and are widely used, particularly by pregnant women. In nature, iron i. |
| Inhalation | Dust may cause mechanical irritation. Long term exposure to dust may cause mild pneumoconiosisPneumoconiosis is a lung condition caused by the inhalation of dust, characterized by formation of nodular fibrotic changes in lungs. Many substances can cause pneumoconiosis including asbestos, silica, talc and metals. Depending on the type of dust, vari. |
| Skin | No adverse effect reported. |
| Eyes | May cause mechanical irritation. Long term exposure may stain the corneaThe cornea is the curved, transparent layer that covers the front part of the eye and protects its lower structures. Together with the lens, the cornea refracts light and consequently helps the eye to focus. The cornea gives a larger contribution to the t. |
| More info | Hazardous Chemical Database |
| SIThe International System of Units (symbol: SI (for the French phrase Systeme International d'Unites , is the most widely used system of units. It is used for everyday commerce in virtually every country of the world except the United States, and it is uni units were used where possible. Unless otherwise stated, standard conditions were used. | |
Iron (III) oxide - also known as ferric oxide, red iron oxide, synthetic maghemite, rouge,or rust - is one of several oxide compounds of iron, and is most notable for its ferromagnetic properties. Its chemical formula is Fe2 O3.
The mineral form of ferric oxide is hematite; it is mined as the main ore of iron.
Iron (III) oxide is often used in magnetic storage, for example in the magnetic layer of floppy disks. These consist of a thin sheet of Mylar® plastic, coated with Iron (III) oxide. The particles can be magnetised to represent binary data. Magnetic Ink Character Recognition also uses Iron (III) oxide compounds, suspended in an ink which can be read by special scanning hardware.
The CAS number of ferric oxide is 1309-37-1.