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 .

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 ), 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. ^*

Its risk and safety phrases are .

External links

Iron compounds | Oxides | Hydroxides

Eisenhydroxid