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Sigma-Aldrich

Cobalt(II) nitrate hexahydrate

ACS reagent, ≥98%

Synonym(s):
Cobaltous nitrate, Cobaltous nitrate hexahydrate, Nitric acid, cobalt(II) salt
Linear Formula:
Co(NO3)2 · 6H2O
CAS Number:
Molecular Weight:
291.03
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent

Quality Level

Assay

≥98%
98.0-102.0%

form

chips
powder, crystals or chunks
solid

reaction suitability

reagent type: catalyst
core: cobalt

impurities

≤0.01% insolubles

pH

4 (20 °C, 100 g/L)

mp

55 °C (lit.)

anion traces

chloride (Cl-): ≤0.002%
sulfate (SO42-): ≤0.005%

cation traces

Ca: ≤0.005%
Cu: ≤0.002%
Fe: ≤0.001%
K: ≤0.01%
Mg: ≤0.005%
NH4+: ≤0.2%
Na: ≤0.05%
Ni: ≤0.15%
Pb: ≤0.002%
Zn: ≤0.01%

SMILES string

O.O.O.O.O.O.[Co++].[O-][N+]([O-])=O.[O-][N+]([O-])=O

InChI

1S/Co.2NO3.6H2O/c;2*2-1(3)4;;;;;;/h;;;6*1H2/q+2;2*-1;;;;;;

InChI key

QGUAJWGNOXCYJF-UHFFFAOYSA-N

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This Item
1.02554203106255599
assay

≥98%, 98.0-102.0%

assay

99.0-102.0% (Co(NO3)2.6H2O basis, complexometric)

assay

99.999% trace metals basis

assay

98%, 98.0-102.0% (ACS specification)

form

chips, powder, crystals or chunks, solid

form

solid

form

crystals and lumps

form

powder, crystals or chunks

impurities

≤0.01% insolubles

impurities

≤0.005% Insoluble matter

impurities

≤15.0 ppm Trace Metal Analysis

impurities

≤0.01% insolubles

pH

4 (20 °C, 100 g/L)

pH

4.0 (20 °C, 100 g/L in H2O)

pH

-

pH

-

mp

55 °C (lit.)

mp

57 °C

mp

55 °C (lit.)

mp

-

Application

Cobalt(II)nitrate hexahydrate can be used as a catalyst to synthesize:
  • 5-Carboxanilide-dihydropyrimidinone derivatives by the condensation of acetoacetanilides, aldehydes, and urea/thiourea.
  • Nitro indoles by the nitration of indoles using tert-butyl nitrite as the nitro source.
  • Quinazolinones from 2-aminobenzonitriles using alcohols in the presence of phosphine ligand.

Signal Word

Danger

Hazard Classifications

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

Storage Class Code

5.1B - Oxidizing hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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