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935719

Sigma-Aldrich

Cobalt(II) nitrate hexahydrate

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≥99.9% trace metals basis

Synonym(s):

Cobalt Nitrate Hexahydrate, Cobalt dinitrate hexahydrate, Cobaltous nitrate, Cobaltous nitrate hexahydrate, Nitric acid, cobalt(II) salt

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About This Item

Linear Formula:
Co(NO3)2 · 6H2O
CAS Number:
Molecular Weight:
291.03
MDL number:
UNSPSC Code:
12352302
NACRES:
NA.21

Quality Level

Assay

≥99.9% trace metals basis

form

powder, crystals or granules (Chunks)

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color

faint red to very dark red

mp

55 °C (lit.)

solubility

soluble, clear to slightly hazy

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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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General description

Cobalt(II)nitrate hexahydrate is red solid which is soluble in water and polar solvents. It is also known as hexaaquacobalt(II) nitrate consists of [Co(OH2)6]2+ and [NO3]ions.
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Application

Cobalt(II) nitrate hexahydrate, has been widely used for the synthesis of Cobalt oxide nanoparticles and cobalt containing compounds. For Example:Cobalt(II) nitrate hexahydrate is used to synthesize cobalt-cobalt oxide/N-doped carbon hybrids, which are then used as hydrogen evolution reaction (HER) or superior oxygen evolution reaction (OER) catalysts in water splitting.

It has also been used as a primary precursor material in the synthesis of Co3O4 nanocrystals in various shapes such as nanosheets, nanocubes, and nanobelts as a catalyst for methane combustion.

Furthermore, the reaction of Cobalt(II) nitrate hexahydrate with Nickel(II) nitrate hexahydrate produces Nickel-cobalt layered double hydroxide nanosheets in presence of methanol and CTAB, which is used as a high-performance electrocatalyst for oxygen evolution.

In addition, Cobalt(II) nitrate hexahydrate precursor powder is calcined to produce Co3O4 nanotubes using the template synthesis method. The Co3O4 nano-tubes, nanorods, and nanoparticles that have been created are used in gas sensing systems and as anode materials for Li-ion batteries

Cobalt hydroxide and layered double hydroxides (CH@LDH) have been synthesized using Cobalt(II)nitrate hexahydrate as a sulfur host for lithium–sulfur batteries.

It is well studied that, Cobalt(II) nitrate hexahydrate is used as a heterogeneous catalyst Co/SiO2 with Silica support, for Fischer−Tropsch Synthesis.

Cobalt(II) Nitrate Hexahydrate is also used as a catalyst for the synthesis of 5-Carboxanilide-dihydropyrimidinone derivatives by the condensation reaction of acetoacetanilide, aldehyde and urea/thiourea.

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 - STOT RE 2 Inhalation

Target Organs

Lungs

Storage Class Code

5.1B - Oxidizing hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Fundamentals of melt infiltration for the preparation of supported metal catalysts. The case of Co/SiO2 for Fischer-Tropsch synthesis
Eggenhuisen T M, et al.
Journal of the American Chemical Society, 132, 18318-18325 (2010)
Nickel?cobalt layered double hydroxide nanosheets as high-performance electrocatalyst for oxygen evolution reaction
Jiang J, et al.
Journal of Power Sources, 278, 445-451 (2015)
Selective catalytic reduction of nitrogen oxides by ammonia over Co3O4 nanocrystals with different shapes
Meng B, et al.
Applied Catalysis. B, Environmental, 129, 491-500 (2013)
In situ cobalt-cobalt oxide/N-doped carbon hybrids as superior bifunctional electrocatalysts for hydrogen and oxygen evolution
Jin H, et al.
Journal of the American Chemical Society, 137, 2688-2694 (2015)
Double-Shelled Nanocages with Cobalt Hydroxide Inner Shell and Layered Double Hydroxides Outer Shell as High-Efficiency Polysulfide Mediator for Lithium-Sulfur Batteries
Zhang J, et al.
Angewandte Chemie (International ed. in English), 55, 3982-3986 (2016)

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