Chromium(II) fluoride

Chromium(II) fluoride
	; Cr2+ F−
Names
	Other names chromium difluoride, chromium fluouride, chromous fluoride
Identifiers
CAS Number	10049-10-2;
3D model (JSmol)	Interactive image;
ChemSpider	59614;
ECHA InfoCard	100.030.140
EC Number	233-168-0;
PubChem CID	66229;
UNII	53XZY98IXY ;
CompTox Dashboard (EPA)	DTXSID30143338 ;
	InChI InChI=1S/Cr.2FH/h;2*1H/q+2;;/p-2 Key: RNFYGEKNFJULJY-UHFFFAOYSA-L;
	SMILES [F-].[F-].[Cr+2];
Properties
Chemical formula	CrF2
Molar mass	89.9929 g·mol−1
Appearance	blue-green iridescent crystals ; hygroscopic, turns to Cr2O3 when heated in air
Density	3.79 g/cm3
Melting point	894 °C (1,641 °F; 1,167 K)
Boiling point	> 1,300 °C (2,370 °F; 1,570 K)
Solubility in water	76.7 g/100 mL
Structure
Crystal structure	monoclinic
Thermochemistry
Std enthalpy of; formation (ΔfH⦵298)	-8.645 kJ/g (solid)
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H314
Precautionary statements	P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chromium(II) fluoride is an inorganic compound with the formula CrF₂. It exists as a blue-green iridescent solid. Chromium(II) fluoride is sparingly soluble in water, almost insoluble in alcohol, and is soluble in boiling hydrochloric acid, but is not attacked by hot distilled sulfuric acid or nitric acid. Like other chromous compounds, chromium(II) fluoride is oxidized to chromium(III) oxide in air.^[2]

^ ^a ^b ^c ^d ^e ^f Perry, Dale L. (2011). Handbook of Inorganic Compounds, Second Edition. Boca Raton, Florida: CRC Press. p. 120. ISBN 978-1-43981462-8. Retrieved 2014-01-10.
^ Merck Index, 14 ed. entry 2245

[Handbook-1] ^ ^a ^b ^c ^d ^e ^f Perry, Dale L. (2011). Handbook of Inorganic Compounds, Second Edition. Boca Raton, Florida: CRC Press. p. 120. ISBN 978-1-43981462-8. Retrieved 2014-01-10.

[2] Merck Index, 14 ed. entry 2245

[1]

[2]

Names
Cr²⁺ F⁻
Other names chromium difluoride, chromium fluouride, chromous fluoride
Identifiers
CAS Number	10049-10-2
3D model (JSmol)	Interactive image
ChemSpider	59614
ECHA InfoCard	100.030.140
EC Number	233-168-0
PubChem CID	66229
UNII	53XZY98IXY^Y
CompTox Dashboard (EPA)	DTXSID30143338
InChI InChI=1S/Cr.2FH/h;2*1H/q+2;;/p-2 Key: RNFYGEKNFJULJY-UHFFFAOYSA-L
SMILES [F-].[F-].[Cr+2]
Properties
Chemical formula	CrF₂
Molar mass	89.9929 g·mol⁻¹
Appearance	blue-green iridescent crystals^[1] hygroscopic, turns to Cr₂O₃ when heated in air^[1]
Density	3.79 g/cm³^[1]
Melting point	894 °C (1,641 °F; 1,167 K)^[1]
Boiling point	> 1,300 °C (2,370 °F; 1,570 K)^[1]
Solubility in water	76.7 g/100 mL
Structure
Crystal structure	monoclinic^[1]
Thermochemistry
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	-8.645 kJ/g (solid)
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H314
Precautionary statements	P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references