Iron(III) oxide-hydroxide
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| Iron(III) oxide-hydroxide | |
|---|---|
| Image:Iron(III) oxide-hydroxide.jpg | |
| Systematic name | Iron(III) oxide-hydroxide |
| Other names | hydrated iron oxide yellow iron oxide Pigment Yellow 42 C.I. 77492 |
| Molecular formula | FeO(OH) |
| Molar mass | xx.xx g/mol |
| Density | x.xxx g/cm3 |
| Solubility (water) | x.xx g/l |
| Melting point | xx.x °C |
| Boiling point | xx.x °C |
| CAS number | [20344-49-4] |
| Disclaimer and references | |
Iron(III) oxide-hydroxide (FeO(OH)), also called hydrated iron oxide and yellow iron oxide, is an oxide-hydroxide of iron. It is a solid material with colors ranging from yellow through dark brown to black. Its CAS number is [20344-49-4] [1].
It occurs naturally as minerals goethite, siderogel, feroxyhyte, limonite, and lepidocrocite. It can be anhydrous or hydrated.
It is also used as a pigment, eg. Pigment Yellow 42 (CAS number [51274-00-1] [2]), or C.I. 77492. Pigment Yellow 42 is Food and Drug Administration (FDA) approved for use in cosmetics and is used in some tattoo inks.
Iron oxide-hydroxide is used in aquarium water treatment as a phosphate binder. [3]
Its risk and safety phrases are R36 R37 R38 S26 S36.
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