Basic information Description Preparation Reactions Sources Safety Supplier Related
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Tricobalt tetraoxide

Basic information Description Preparation Reactions Sources Safety Supplier Related

Tricobalt tetraoxide Basic information

Product Name:
Tricobalt tetraoxide
Synonyms:
  • Co3-O4
  • Cobalt oxide (Co3O4)
  • Cobalticcobaltousoxide
  • cobaltic-cobaltousoxide
  • cobalto-cobaltictetroxide
  • COBALTOXIDE,BLACK,POWDER,TECHNICAL
  • Tricobalttetraoxid
  • COBALT(II,III)OXIDE: 99.8%, POWDER
CAS:
1308-06-1
MF:
Co3O4-2
MW:
240.8
EINECS:
215-157-2
Product Categories:
  • metal oxide
  • supported metal oxide, catalyst
  • 27: Co
  • CobaltMaterials Science
  • Metal and Ceramic Science
  • Cobalt
  • Inorganics
  • Nanomaterials
  • Nanoparticles: Oxides, Nitrides, and Other CeramicsNanomaterials
  • Nanopowders and Nanoparticle Dispersions
  • Oxides
Mol File:
1308-06-1.mol
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Tricobalt tetraoxide Chemical Properties

Melting point:
895 °C (dec.)(lit.)
Boiling point:
3800°C
Density 
6.11 g/mL at 25 °C(lit.)
vapor pressure 
0Pa at 20℃
solubility 
insoluble in H2O; soluble in acid solutions, alkaline solutions
form 
powder
color 
Dark Gray
Specific Gravity
6.11
Water Solubility 
Soluble in acids and alkalis. Insoluble in water.
Crystal Structure
Spinel type
crystal system
Cube
Merck 
14,2429
Space group
Fd3m
Lattice constant
a/nmb/nmc/nmα/oβ/oγ/oV/nm3
0.808350.808350.808359090900.5282
Exposure limits
ACGIH: TWA 0.02 mg/m3
InChI
InChI=1S/3Co.4O
InChIKey
LBFUKZWYPLNNJC-UHFFFAOYSA-N
SMILES
O([Co]=O)[Co]=O.O=[Co]
CAS DataBase Reference
1308-06-1(CAS DataBase Reference)
NIST Chemistry Reference
Cobalt oxide(1308-06-1)
EPA Substance Registry System
Cobalt tetraoxide (1308-06-1)
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Safety Information

Hazard Codes 
Xn,T,Xi
Risk Statements 
36/37/38-40-43-49-50/53-42-52/53
Safety Statements 
26-36/37/39-45-36/37-53-61-22
RIDADR 
1477
WGK Germany 
1
RTECS 
GG2500000
TSCA 
Yes
HazardClass 
9
HS Code 
28220000

MSDS

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Tricobalt tetraoxide Usage And Synthesis

Description

Cobalt Oxide (II, III) is a kind oxide of cobalt. It has applications in enamels, semiconductors, grinding wheels. As an important inorganic material, it can be used in catalysis, superconductors, ceramics and other fields. It can also be used as catalyst and catalyst carrier, as electrode active material, for glass, porcelain colorants and pigments, as chemical industry oxidant and as a catalyst for organic synthesis, in senior goggles and other filter materials, in temperature and gas sensors, in electronic ceramics, in lithium ion battery electrode materials, magnetic materials, electrochromic devices, enamels, solar energy absorbers. Cobalt oxide nanoparticles can readily enter cells, and have the potential to be used for hyperthermic treatment, gene therapy and drug delivery. It is more commonly applied for energy storage such as Lithium-ion battery. It may also be used as a gas sensor in sensing toluene, acetone and some other toxic vapors.

Preparation

Tricobalt tetroxide is obtained when cobalt(II) carbonate, cobalt(II) or cobalt(III) oxide, or cobalt hydroxide oxide, CoO(OH) is heated in air at temperatures above 265°C. The temperature must not exceed 800°C (see decomposition temperature above).

Reactions

Heating above 900°C expels oxygen out of the molecule forming cobalt(II) oxide:
2Co3O4 6CoO + O2
Tricobalt tetroxide absorbs oxygen at lower temperatures, but there is no change in the crystal structure.)
The oxide is reduced to its metal by hydrogen, carbon or carbon monoxide.
Co3O4 + 4H2 3Co + 4H2O
Co3O4 + 4CO 3Co + 4CO2

Sources

https://en.wikipedia.org/wiki/Cobalt(II,III)_oxide
https://www.alfa.com/zh-cn/catalog/040184/
https://en.wikipedia.org/wiki/Cobalt_oxide_nanoparticle
https://pubchem.ncbi.nlm.nih.gov/compound/6432046#section=Top

Chemical Properties

Black fine powder

Physical properties

Black cubic crystal; density 6.11 g/cm3; decomposes above 900°C, losing oxygen; insoluble in water; soluble in acids and alkalis.

Uses

It is used in artificial photosynthesis. It is used as a magnetic semiconductor. It is also employed in supercapacitors and lithium-ion batteries.

Uses

In enamels; in semiconductors; in grinding wheels.

Flammability and Explosibility

Not classified

Tricobalt tetraoxide Preparation Products And Raw materials

Raw materials

Tricobalt tetraoxideSupplier

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