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60818 Sigma-Aldrich

Cobalt(II) chloride

purum p.a., anhydrous, ≥98.0% (KT)

Synonym: Cobalt dichloride, Cobalt muriate, Cobaltous chloride, Dichlorocobalt

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Properties

Related Categories Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography, Cobalt Salts, Essential Chemicals,
vapor pressure   40 mmHg ( 0 °C)
InChI Key   GVPFVAHMJGGAJG-UHFFFAOYSA-L
grade   purum p.a.
assay   ≥98.0% (KT)
impurities   ≤2% water
mp   724 °C (lit.)
anion traces   sulfate (SO42-): ≤50 mg/kg
cation traces   Ca: ≤50 mg/kg
  Cd: ≤50 mg/kg
  Cu: ≤50 mg/kg
  Fe: ≤50 mg/kg
  K: ≤100 mg/kg
  Na: ≤200 mg/kg
  Ni: ≤1000 mg/kg
  Pb: ≤50 mg/kg
  Zn: ≤50 mg/kg

Description

General description

Cobalt(II) chloride is an anhydrous cobalt salt. Cobalt(II) chloride participates in the synthesis of various esters in the presence of acetonitrile.

Application

Cobalt(II) chloride may be employed as a catalyst in the following studies:
• Acylation of various alcohols (primary and secondary).
• Acylation of various hydroxyl compounds (high selectivity).
• Regioselective ring-opening reaction of oxiranes.
• Coupling reactions of anhydrides or acid chlorides with thiols.
• Protection of aldehydes, via chemoselective dithioacetalization reaction.
• Solvent-free synthesis of β-enaminones and β-enamino esters.

The vapor-phase co-reductions with other metal halides by hydrogen results in finely divided intermetallics with applications as structural materials or compounds with useful thermoelectric, magnetic, and oxidation-resistance properties.

Safety & Documentation

Safety Information

Signal word 
Danger
RIDADR 
UN 3077 9 / PGIII
WGK Germany 
3
RTECS 
GF9800000

Documents

Certificate of Analysis

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Protocols & Articles
Peer-Reviewed Papers
15

References

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