Chromium(III) chloride

Chromium(III) chloride
	; Anhydrous
	; Hexahydrate
Names
	IUPAC name Chromium(III) chloride; Chromium trichloride;
	Other names Chromic chloride
Identifiers
CAS Number	10025-73-7 ; 10060-12-5 (hexahydrate) ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:53351 ;
ChEMBL	ChEMBL1200528 ;
ChemSpider	4954736 ;
DrugBank	DB09129;
ECHA InfoCard	100.030.023
Gmelin Reference	1890 130477 532690
PubChem CID	6452300;
RTECS number	GB5425000;
UNII	Z310X5O5RP ; KB1PCR9DMW (hexahydrate) ;
CompTox Dashboard (EPA)	DTXSID20858722 ;
	InChI InChI=1S/3ClH.Cr/h31H;/q;;;+3/p-3 Key: QSWDMMVNRMROPK-UHFFFAOYSA-K ; InChI=1/3ClH.Cr/h31H;/q;;;+2/p-3 Key: HUQISNLCWMVGCG-DFZHHIFOAJ; InChI=1/3ClH.Cr/h3*1H;/q;;;+3/p-3 Key: QSWDMMVNRMROPK-DFZHHIFOAF;
	SMILES Cl[Cr](Cl)Cl;
Properties
Chemical formula	CrCl3
Molar mass	158.36 g/mol (anhydrous); 266.45 g/mol (hexahydrate)
Appearance	Purple (anhydrous), dark green (hexahydrate)
Density	2.87 g/cm3 (anhydrous); 1.760 g/cm3 (hexahydrate)
Melting point	1,152 °C (2,106 °F; 1,425 K) (anhydrous); 81 °C (hexahydrate)
Boiling point	1,300 °C (2,370 °F; 1,570 K) decomposes
Solubility in water	slightly soluble (anhydrous); 585 g/L (hexahydrate)
Solubility	insoluble in ethanol ; insoluble in ether, acetone
Acidity (pKa)	2.4 (0.2M solution)
Magnetic susceptibility (χ)	+6890.0·10−6 cm3/mol
Structure
Crystal structure	YCl3 structure
Coordination geometry	Octahedral
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H314, H411
Precautionary statements	P260, P264, P270, P273, P280, P301+P312, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P330, P363, P391, P405, P501
NFPA 704 (fire diamond)	3 0 0
Flash point	Non-flammable
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	1870 mg/kg (oral, rat)
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1 mg/m3
REL (Recommended)	TWA 0.5 mg/m3
IDLH (Immediate danger)	250 mg/m3
Safety data sheet (SDS)	ICSC 1316 (anhydrous); ICSC 1532 (hexahydrate)
Related compounds
Other anions	Chromium(III) fluoride; Chromium(III) bromide; Chromium(III) iodide;
Other cations	Molybdenum(III) chloride; Tungsten(III) chloride;
Related compounds	Chromium(II) chloride; Chromium(IV) chloride;
	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

Chromium(III) chloride (also called chromic chloride) is an inorganic chemical compound with the chemical formula Cr Cl₃. It forms several hydrates with the formula CrCl₃·nH₂O, among which are hydrates where n can be 5 (chromium(III) chloride pentahydrate CrCl₃·5H₂O) or 6 (chromium(III) chloride hexahydrate CrCl₃·6H₂O). The anhydrous compound with the formula CrCl₃ are violet crystals, while the most common form of the chromium(III) chloride are the dark green crystals of hexahydrate, CrCl₃·6H₂O. Chromium chlorides find use as catalysts and as precursors to dyes for wool.

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