Iron(II) oxide

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{{Chembox simple inorganic

|ImageFile=Iron(II) oxide.jpg
|IUPACName=Iron(II) oxide
|OtherNames=Ferrous oxide
Wüstite
|Formula=FeO
|MolarMass=71.85 g/mol
|CASNo=1345-25-1
|Density=6.0 g/cm³ (solid)
|Solubility=insoluble
|MeltingPt=1370 °C
|BoilingPt=3414 °C decomp.}}

Iron(II) oxide, also called ferrous oxide or ferrous iron is one of iron oxides. It is a black-colored powder with the chemical formula Fe{{#if:{{{1|}}}|_{{{1}}}|}}O{{#if:{{{1|}}}|_{{{1}}}|}}. It consists of the chemical element iron in the oxidation state of 2 bonded to oxygen. Its mineral form is known as Wüstite. The latter term is often used synonymously to ferrous oxide

Molecular weight: 71.85
Melting Point: 1370°C
CAS number: 1345-25-1

Iron(II) oxide should not be confused with rust, which usually consists of iron(III) oxide.

Iron(II) oxide is used as a pigment. It is FDA-approved for use in cosmetics and it is used in some tattoo inks.

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