Chromium(III) fluoride

Chromium(III) fluoride is an inorganic compound with the chemical formula CrF3. It forms several hydrates. The compound CrF3 is a green crystalline solid that is insoluble in common solvents, but the hydrates [Cr(H2O)6]F3 (violet) and [Cr(H2O)6]F3·3H2O (green) are soluble in water. The anhydrous form sublimes at 1100–1200 °C.

Chromium(III) fluoride
Names
IUPAC name
Chromium(III) fluoride
Other names
Chromium trifluoride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.216
PubChem CID
RTECS number
  • GB6125000
UNII
  • InChI=1S/Cr.3FH/h;3*1H/q+3;;;/p-3 Y
    Key: FTBATIJJKIIOTP-UHFFFAOYSA-K Y
  • InChI=1/Cr.3FH/h;3*1H/q+3;;;/p-3
    Key: FTBATIJJKIIOTP-DFZHHIFOAR
SMILES
  • [Cr+3].[F-].[F-].[F-]
Properties
CrF3
Molar mass
  • 108.9913 g/mol (anhydrous)
  • 163.037 g/mol (trihydrate)
  • 181.05 g/mol (tetrahydrate)
Appearance green crystalline solid
Density 3.8 g/cm3 (anhydrous)
2.2 g/cm3 (trihydrate)
Melting point 1,100 °C (2,010 °F; 1,370 K) (sublimes)
negligible (anhydrous)
sparingly soluble (trihydrate)
Solubility Insoluble in alcohols
Soluble in HF, HCl
Magnetic susceptibility (χ)
 +4370.0·10−6 cm3/mol
Structure
Rhombohedral, hR24
Space group
 R-3c, No. 167
Hazards
Lethal dose or concentration (LD, LC):
LD50 (median dose)
 150 mg/kg (guinea pig, oral)
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 1 mg/m3
REL (Recommended)
 TWA 0.5 mg/m3
IDLH (Immediate danger)
 250 mg/m3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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