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637025

Sigma-Aldrich

Cobalt(II,III) oxide

nanopowder, <50 nm particle size (SEM), 99.5% trace metals basis

Synonym(s):

Cobalt tetraoxide, Cobaltic-cobaltous oxide, Tricobalt tetraoxide

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About This Item

Linear Formula:
~Co3O4
CAS Number:
Molecular Weight:
240.80
MDL number:
UNSPSC Code:
12352302
PubChem Substance ID:
NACRES:
NA.23

Quality Level

Assay

99.5% trace metals basis

form

nanopowder

surface area

40-70 m2/g , typical range

particle size

<50 nm (SEM)

mp

895 °C (dec.) (lit.)

density

6.11 g/mL at 25 °C (lit.)

bulk density

0.57 g/mL

application(s)

battery manufacturing

SMILES string

O=[Co].O=[Co]O[Co]=O

InChI

1S/3Co.4O

InChI key

LBFUKZWYPLNNJC-UHFFFAOYSA-N

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General description

Cobalt oxide is a p-type semiconductor thatbelongs to the normal spinel crystal structure with cubic close packing ofoxide ions. It has variable oxidation states and multiple band gapenergies (2.28eV and 1.57eV). It is paramagnetic at room temperature.

Application

Cobalt(II,III) oxide nanoparticles can be used:

  • To modify the glassycarbon electrode for the detection of As(III) at nanomolar concentrationrange.
  • To prepare a robust photocatalyst along withcarbon nanospheres for dye degradation and hydrogen evolution reaction.
  • As an electrodematerial in the preparation of supercapacitors.

Pictograms

Health hazard

Signal Word

Danger

Hazard Statements

Hazard Classifications

Aquatic Chronic 3 - Carc. 1A Inhalation - Resp. Sens. 1

Storage Class Code

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 1

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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Cody C Wyles et al.
The Journal of arthroplasty, 35(4), 1123-1129 (2019-12-20)
The aims of this study were to determine the levels of cobalt (Co) and chromium (Cr) ions generated in simulators from metal-on-polyethylene (MoP) and ceramic-on-polyethylene (CoP) constructs. Furthermore, we aimed to investigate the cytotoxic effect of these ion levels on
Yik-Lam Cho et al.
Free radical biology & medicine, 153, 173-186 (2020-05-01)
Nickel oxide nanoparticles (NiO-NPs) are an important group of nanoparticles with increasing applications in many aspects of industry. At present, there is evidence demonstrating the cytotoxic characteristics of NiO-NPs, while the involvement of autophagy in the cytotoxicity of NiO-NPs has
Kentaro Suehara et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 22(7), 675-683 (2021-01-27)
Pulsed laser melting in liquid (PLML) is a technique to fabricate spherical submicrometer particles (SMPs) wherein nanosecond pulsed laser (several tens to several hundreds of mJ pulse-1 cm-2 ) irradiates raw particles dispersed in liquid. Raw particles are transiently heated

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