Iron(II) oxide

Iron(II) oxide
Names
	IUPAC name Iron(II) oxide
	Other names Ferrous oxide,iron monoxide
Identifiers
CAS Number	1345-25-1 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:50820 ;
ChemSpider	14237 ;
ECHA InfoCard	100.014.292
Gmelin Reference	13590
PubChem CID	14945;
UNII	G7036X8B5H ;
CompTox Dashboard (EPA)	DTXSID1041976 ;
	InChI InChI=1S/Fe.O Key: UQSXHKLRYXJYBZ-UHFFFAOYSA-N ; InChI=1/Fe.O/rFeO/c1-2 Key: UQSXHKLRYXJYBZ-WPTVXXAFAB;
	SMILES [Fe]=O;
Properties
Chemical formula	FeO
Molar mass	71.844 g/mol
Appearance	black crystals
Density	5.745 g/cm3
Melting point	1,377 °C (2,511 °F; 1,650 K)
Boiling point	3,414 °C (6,177 °F; 3,687 K)
Solubility in water	Insoluble
Solubility	insoluble in alkali, alcohol ; dissolves in acid
Magnetic susceptibility (χ)	+7200·10−6 cm3/mol
Refractive index (nD)	2.23
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	can be combustible under specific conditions
NFPA 704 (fire diamond)	1 1 0
Autoignition; temperature	200 °C (392 °F; 473 K)
Safety data sheet (SDS)	ICSC 0793
Related compounds
Other anions	Iron(II) sulfide; Iron(II) selenide; Iron(II) telluride
Other cations	Manganese(II) oxide; Cobalt(II) oxide
Related Iron oxides	Iron(II,III) oxide; Iron(III) oxide
Related compounds	Iron(II) fluoride
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Iron(II) oxide or ferrous oxide is the inorganic compound with the formula FeO. Its mineral form is known as wüstite. One of several iron oxides, it is a black-colored powder that is sometimes confused with rust, the latter of which consists of hydrated iron(III) oxide (ferric oxide). Iron(II) oxide also refers to a family of related non-stoichiometric compounds, which are typically iron deficient with compositions ranging from Fe_0.84O to Fe_0.95O.

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