10049-05-5

Basic information

• Product Name: Chromium(II) chloride
• Synonyms: Chromiumdichloride;Chromium(II) chloride;Chromous chloride
• CAS NO: 10049-05-5
• Molecular Formula: Cl₂Cr
• Molecular Weight: 122.90
• EINECS: 233-163-3
• Mol File: 10049-05-5.mol

Chemical Properties

• Boiling Point: °Cat760mmHg
• Flash Point: °C
• Appearance: grey green powder
• Density: g/cm³
• CAS DataBase Reference: Chromium(II) chloride(CAS DataBase Reference)
• NIST Chemistry Reference: Chromium(II) chloride(10049-05-5)
• EPA Substance Registry System: Chromium(II) chloride(10049-05-5)

Safety Data

• Hazardous Substances Data: 10049-05-5(Hazardous Substances Data)

Usage

Uses

Used in Organic Synthesis:
Chromium(II) chloride is used as a catalyst in organic synthesis for facilitating various chemical reactions. Its reducing properties make it a valuable component in the synthesis of complex organic molecules, enhancing the efficiency and selectivity of the reactions.
Used in Chemical Production:
In the chemical industry, chromium(II) chloride serves as a reagent in the production of other chromium compounds. Its ability to act as a reducing agent aids in the synthesis of a range of chromium-based materials with diverse applications.
Used in Pigment and Dye Manufacturing:
Chromium(II) chloride is utilized in the manufacturing of pigments and dyes due to its color-producing properties. Its blue-green hue contributes to the creation of vibrant and stable colorants used in various industries, including textiles, paints, and plastics.
Used in Material Science Research:
The magnetic properties of chromium(II) chloride in its solid form have attracted interest in material science research. Studies on its polymeric structure and magnetic behavior contribute to the development of new materials with potential applications in data storage, sensors, and other advanced technologies.

InChI:InChI=1S/2ClH.Cr/h2*1H;/q;;+2/p-2

Synthetic route

chromium(III) chloride (10025-73-7) → chromium tetrachloride (15597-88-3) + chromium (II) chloride (10049-05-5)

Conditions	Yield
In neat (no solvent) byproducts: Cl2; vaporization of anhydrous CrCl3 in vac. at 780°C;; detected by mass-spectroscopy of gas phase and IR-spectroscopy after matrix isolation;;

chromium (7440-47-3) + silver(I) chloride → chromium (II) chloride (10049-05-5)

Conditions	Yield
In neat (no solvent) in situ (650°C); isolation in N2 solid matrix;
In neat (no solvent, solid phase) mixt. of metal (tenfold excess) and AgCl heated in Ar (400 Torr) until react. was complete; cooled, evacuated, co-condensed with solid matrix (N2 or Ar);

chromium monochloride (49681-65-4) → chromium (7440-47-3) + chromium (II) chloride (10049-05-5)

Conditions	Yield
In neat (no solvent, gas phase) equilibrium reaction was studied at 1425-1596 K;

5-formyl-2-[2-(5-methyl-2-phenyl-4-oxazolyl)-ethoxy]pyridine (157169-61-4) + ethyl 1-bromocyclobutane-1-carboxylate (35120-18-4) + chromium (II) chloride (10049-05-5) → ethyl 1-(hydroxy{6-[2-(5-methyl-2-phenyl-1,3-oxazol-4-yl)ethoxy]pyridin-3-yl}methyl)cyclobutanecarboxylate

Conditions	Yield
With lithium iodide In tetrahydrofuran; water; ethyl acetate	37%

[(4-methoxybenzenesulfonyl)-2-oxo-athyl)-amino]acetic acid t-butyl ester + E-styryl iodide (42599-24-6) + chromium (II) chloride (10049-05-5) + nickel(II) chloride (7718-54-9) → (+)-(E)-[(2-hydroxy-4-phenyl-but-3-enyl)-(4-methoxybenzenesulphonyl)-amino]-acetic acid t-butyl ester

Conditions	Yield
In N-methyl-acetamide

21-acetoxy-3,3-ethylenedioxy-20-nitropregna-5,16-dien-9α-ol (124926-67-6) + chromium (II) chloride (10049-05-5) + zinc (7440-66-6) → 21-acetoxy-9α-hydroxy-20-hydroxyiminopregna-4,16-dien-3-one

Conditions	Yield
With hydrogenchloride In water; acetone
With hydrogenchloride In water; acetone

chromium (II) chloride (10049-05-5) + 2-(N,N-dimethylaminomethyl)phenyllithium (56174-66-4) → bis(2-dimethylaminomethylphenyl)chromium

Conditions	Yield
In tetrahydrofuran; toluene; pentane

chromium (II) chloride (10049-05-5) + 2-(dimethylamino)benzyllithium (64308-58-3) → bis-(2-dimethylaminobenzyl)chromium

Conditions	Yield
In tetrahydrofuran; toluene; pentane

manganese (7439-96-5) + chromium (II) chloride (10049-05-5) + tert-butyl-chlorosilane (98194-56-0) + 2-bromo-4-methoxy-6-nitrophenol (115929-59-4) → 7-Bromo-2-phenyl-benzooxazol-5-ol (440122-89-4) + 7-bromo-5-methoxy-2-phenyl-benzooxazole (440123-25-1)

Conditions	Yield
With benzaldehyde In N-methyl-acetamide; hexane; water; ethyl acetate

iron monochloride (27846-09-9) + chromium (II) chloride (10049-05-5) → chromium monochloride (49681-65-4) + iron(II)chloride (7758-94-3)

Conditions	Yield
In neat (no solvent, gas phase) equilibrium reaction was studied at 1349-1596 K;

Upstream product

• 49681-65-4 chromium monochloride 
• 7440-47-3 chromium 
• 10025-73-7 chromium(III) chloride 

Downstream Products

• 440122-89-4 7-Bromo-2-phenyl-benzooxazol-5-ol 
• 440123-25-1 7-bromo-5-methoxy-2-phenyl-benzooxazole 
• 49681-65-4 chromium monochloride 
• 7758-94-3 iron(II)chloride 

Relevant articles and documents

Interatomic distances for some first row transition element dichlorides isolated in cryogenic matrices using x-ray absorption fine structure spectroscopy

X-ray absorption fine structure (XAFS) data for several 3d transition metal dichlorides isolated in nitrogen, argon, or methane matrices have been collected and analyzed.The bond lengths obtained are in reasonable agreement with those from vapor phase ele

Mass-spectrometric Determination of the Enthalpies of Formation of Chromium Chloride and Oxide Chloride Molecules

Molecules of CrCl and ClCrO have been observed by the Knudsen effusion method with mass-spectrometric detection in the vapour over chromium oxide after adding barium chloride vapour.The isomolecular equilibria involving these molecules have been studied, and their ionisation potentials and enthalpies of formation have been determined.

Matrix isolation and Mass Spectrometric Studies on the Vaporisation of Chromium(III) Chloride. The Characterisation of Molecular CrCl4 and CrCl3

Mass spectrometric and matrix isolation i.r. studies on the vaporisation of solid chromium(III) chloride over the temperature range 550-800 deg C reveal three different molecular chromium halides.At the lowest temperatures, CrCl4 is identified as the most volatile species and its tetrahedral structure confirmed by isotope patterns.At ca. 600 deg C, a new molecular species, CrCl3, appears and its structure is similarly shown to be planar (D3h).Further heating to ca. 780 deg C results in the formation of molecular CrCl2.The results are discussed in the light of previous studies on transition metal halide systems.