Copper(II) fluoride

Copper(II) fluoride
	; Unit cell of the anhydrous form
	; Ball-and-stick model of crystal packing in the anhydrous form
	; Dihydrate
Names
	IUPAC name Copper difluoride
	Other names Cupric fluoride; Copper fluoride; Copper (2+) Difluoride
Identifiers
CAS Number	7789-19-7 ; 13454-88-1 (dihydrate) ;
3D model (JSmol)	Interactive image;
ChemSpider	74214 ;
ECHA InfoCard	100.029.225
EC Number	232-147-3;
PubChem CID	82236;
UNII	ML04XYE5C1 ; 3A38PC42E9 (dihydrate) ;
CompTox Dashboard (EPA)	DTXSID80894782 ;
	InChI InChI=1S/Cu.2FH/h;21H/q+2;;/p-2 Key: GWFAVIIMQDUCRA-UHFFFAOYSA-L ; InChI=1/Cu.2FH/h;21H/q+2;;/p-2 Key: GWFAVIIMQDUCRA-NUQVWONBAF;
	SMILES [Cu+2].[F-].[F-];
Properties
Chemical formula	CuF2
Molar mass	101.543 g/mol (anhydrous) ; 137.573 g/mol (dihydrate)
Appearance	White crystalline powder; When hydrated: Blue
Density	4.23 g/cm3 (anhydrous) ; 2.934 g/cm3 (dihydrate)
Melting point	836 °C (1,537 °F; 1,109 K) (anhydrous) ; 130 °C (dihydrate, decomposes)
Boiling point	1,676 °C (3,049 °F; 1,949 K) (anhydrous)
Magnetic susceptibility (χ)	+1050.0·10−6 cm3/mol
Hazards
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1 mg/m3 (as Cu)
REL (Recommended)	TWA 1 mg/m3 (as Cu)
IDLH (Immediate danger)	TWA 100 mg/m3 (as Cu)
Related compounds
Other anions	Copper(II) bromide; Copper(II) chloride
Other cations	Silver(II) fluoride; Cobalt(II) fluoride
Related compounds	Copper(I) 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

Copper(II) fluoride is an inorganic compound with the chemical formula CuF₂. The anhydrous form is a white, ionic, crystalline, hygroscopic salt with a distorted rutile-type crystal structure, similar to other fluorides of chemical formulae MF₂ (where M is a metal). The dihydrate, CuF₂·2H₂O, is blue in colour.

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