Chromium(III) chloride

Chromium(III) chloride

Anhydrous
Green form of chromium(III) chloride hexahydrate
Hexahydrate
Names
IUPAC name
  • Chromium(III) chloride
  • Chromium trichloride
Other names
Chromic chloride
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
DrugBank
ECHA InfoCard 100.030.023 Edit this at Wikidata
1890 130477 532690
RTECS number
  • GB5425000
UNII
  • InChI=1S/3ClH.Cr/h3*1H;/q;;;+3/p-3 checkY
    Key: QSWDMMVNRMROPK-UHFFFAOYSA-K checkY
  • InChI=1/3ClH.Cr/h3*1H;/q;;;+2/p-3
    Key: HUQISNLCWMVGCG-DFZHHIFOAJ
  • InChI=1/3ClH.Cr/h3*1H;/q;;;+3/p-3
    Key: QSWDMMVNRMROPK-DFZHHIFOAF
  • anhydrous: Cl[Cr](Cl)Cl
  • common hexahydrate: Cl[Cr-3](Cl)([OH2+])([OH2+])([OH2+])[OH2+].[Cl-].O.O
Properties
CrCl3
Molar mass 158.36 g/mol (anhydrous)
266.45 g/mol (hexahydrate)[1]
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)[2]
Boiling point 1,300 °C (2,370 °F; 1,570 K) decomposes
slightly soluble (anhydrous)
585 g/L (hexahydrate)
Solubility insoluble in ethanol
insoluble in ether, acetone
Acidity (pKa) 2.4 (0.2M solution)
+6890.0·10−6 cm3/mol
Structure
YCl3 structure
Octahedral
Hazards
GHS labelling:
GHS05: CorrosiveGHS07: Exclamation markGHS09: Environmental hazard
Danger
H302, H314, H411
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)
[5]
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
3
0
0
Flash point Non-flammable
Lethal dose or concentration (LD, LC):
1870 mg/kg (oral, rat)[4]
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 1 mg/m3[3]
REL (Recommended)
 TWA 0.5 mg/m3[3]
IDLH (Immediate danger)
 250 mg/m3[3]
Safety data sheet (SDS) ICSC 1316 (anhydrous)
ICSC 1532 (hexahydrate)
Related compounds
Other anions
Other cations
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Chromium(III) chloride (also called chromic chloride) is an inorganic chemical compound with the chemical formula CrCl3. 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.

  1. ^ "Chromium(III) chloride sublimation, 99 10025-73-7".
  2. ^ "Chromium(III) chloride hexahydrate Technipur™ | Sigma-Aldrich". Retrieved 2022-08-16.
  3. ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0141". National Institute for Occupational Safety and Health (NIOSH).
  4. ^ "Chromium(III) compounds [as Cr(III)]". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  5. ^ Cameo Chemicals MSDS