Chromium(II) oxide

Chromium(II) oxide
Names
	IUPAC name chromium(II) oxide
Identifiers
CAS Number	12018-00-7 ;
PubChem CID	3037052;
CompTox Dashboard (EPA)	DTXSID20152717 ;
Properties
Chemical formula	CrO
Molar mass	67.996 g/mol
Appearance	black
Melting point	300 °C (572 °F; 573 K) (decomposes)
Structure
Crystal structure	cubic, cF8
Space group	Fm3m, No. 225
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Chromium(II) oxide (CrO) is an inorganic compound composed of chromium and oxygen.^[1] It is a black powder that crystallises in the rock salt structure.^[2] Hypophosphites may reduce chromium(III) oxide to chromium(II) oxide:

H₃PO₂ + 2 Cr₂O₃ → 4 CrO + H₃PO₄

It is readily oxidized by the atmosphere. CrO is basic, while CrO
3 is acidic, and Cr
2O
3 is amphoteric.^[3]

References

^ Satish. Anand, Raj. Kumar (1989), Dictionary of Inorganic Chemistry, Anmol Publications, ISBN 978-81-7041-236-6
^ Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier ISBN 0-12-352651-5
^ Chemistry 7th edition, by Raymond Chang page 645 (problem 15.100)

[1] Satish. Anand, Raj. Kumar (1989), Dictionary of Inorganic Chemistry, Anmol Publications, ISBN 978-81-7041-236-6

[Wiberg&Holleman-2] Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier ISBN 0-12-352651-5

[3] Chemistry 7th edition, by Raymond Chang page 645 (problem 15.100)

[1]

[2]

[3]

Names

IUPAC name chromium(II) oxide
Identifiers
CAS Number	12018-00-7
PubChem CID	3037052
CompTox Dashboard (EPA)	DTXSID20152717
Properties
Chemical formula	CrO
Molar mass	67.996 g/mol
Appearance	black
Melting point	300 °C (572 °F; 573 K) (decomposes)
Structure
Crystal structure	cubic, cF8
Space group	Fm3m, No. 225
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Chromium(II) oxide

See also

References