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202185

Sigma-Aldrich

Cobalt(II) chloride hexahydrate

reagent grade

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Synonym(s):
Cobaltous chloride hexahydrate
Linear Formula:
CoCl2 · 6H2O
CAS Number:
7791-13-1
Molecular Weight:
237.93
EC Number:
231-589-4
MDL number:
MFCD00149652
UNSPSC Code:
12352300
PubChem Substance ID:
329751992
NACRES:
NA.21

grade

reagent grade

Quality Level

200

vapor pressure

40 mmHg ( 0 °C)

form

crystals or chunks

concentration

24.0-25.5% (EDTA titration)

SMILES string

O.O.O.O.O.O.Cl[Co]Cl

InChI

1S/2ClH.Co.6H2O/h2*1H;;6*1H2/q;;+2;;;;;;/p-2

InChI key

GFHNAMRJFCEERV-UHFFFAOYSA-L

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General description

Cobalt(II) chloride hexahydrate has a cobalt ion surrounded by a tetragonal arrangement of chloride ligands. Four water molecules occupy a square plane about cobalt while chloride ions occupy axial positions. Its crystals belong to the monoclinic lattice system.

Application

Cobalt(II) chloride hexahydrate may be used in the following studies:
  • For the in-situ synthesis of nickel(0) and cobalt(0) nanoclusters stabilized by poly(4-styrene sulfonic acid-co-maleic acid).
  • Preparation of polyvinylidene fluoride (PVDF)-cobalt (II) chloride hexahydrate nanofiber composites, via electrospinning method.
  • As catalyst for the synthesis of 2-arylbenzimidazole.
  • Acetylation of alcohols with carboxylic acids to form the corresponding acylated products.
  • Tosylation of aliphatic and aromatic alcohols with tosylic acid.

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1B Inhalation - Eye Dam. 1 - Muta. 2 - Repr. 1B - Resp. Sens. 1 - Skin Sens. 1

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

危险化学品

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Crystal spectra of cobalt (II) chloride hexahydrate
Joy HW and Fogel N
The Journal of Physical Chemistry, 79(4), 345-349 (1975)
Cobalt (II) catalyzed tosylation of alcohols with p-toluenesulfonic acid.
Velusamy S, et al.
Tetrahedron Letters, 45(1), 203-205 (2004)
A simple and convenient one-pot synthesis of benzimidazole derivatives using cobalt (II) chloride hexahydrate as catalyst.
Khan AT, et al.
Synthetic Communications, 39(13), 2339-2346 (2009)
Cobalt (II)-catalyzed direct acetylation of alcohols with acetic acid.
Velusamy S, et al.
Tetrahedron, 61(8), 2011-2015 (2005)
Preparation of PVDF nanofiber composites for hydrogen generation from sodium borohydride.
Chinnappan A, et al.
Energy, 36(2), 755-759 (2011)
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