Iron(III) oxide-hydroxide
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Iron(III) oxide-hydroxide ((O)), 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][link].
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][link]), 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. [link]
Its risk and safety phrases are R36 R37 R38 S26 S36.
External links
- For a full list of external links to MSDSs, spectroscopic data, commercial chemicals suppliers etc. for this compound, see [Chemical sources].
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