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Tricobalt tetraoxide

Uses Preparation Reactions
Tricobalt tetraoxide
Tricobalt tetraoxide
Chemical Name:
Tricobalt tetraoxide
Co3-O4;Cobalt(II;COBALT BLACK;CobaltOxideGr;COBALTIC OXIDE;cobaltosicoxide;CobaltOxidePure;cobalt Tetroxide;COBALT SESQUIOXIDE;Tricobalttetroxide
Molecular Formula:
Formula Weight:
MOL File:

Tricobalt tetraoxide Properties

Melting point:
895 °C (dec.)(lit.)
Boiling point:
6.11 g/mL at 25 °C(lit.)
Dark Gray
Water Solubility 
Soluble in acids and alkalis. Insoluble in water.
CAS DataBase Reference
1308-06-1(CAS DataBase Reference)
NIST Chemistry Reference
Cobalt oxide(1308-06-1)
EPA Substance Registry System
Cobalt oxide (Co3O4)(1308-06-1)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
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
HazardClass  9
HS Code  28220000
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501
H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled Sensitisation, respiratory Category 1 Danger P261, P285, P304+P341, P342+P311,P501
H351 Suspected of causing cancer Carcinogenicity Category 2 Warning P201, P202, P281, P308+P313, P405,P501
H400 Very toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 1 Warning P273, P391, P501
H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
H412 Harmful to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 3 P273, P501
Precautionary statements:
P201 Obtain special instructions before use.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P284 Wear respiratory protection.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P308+P313 IF exposed or concerned: Get medical advice/attention.
P342+P311 IF experiencing respiratory symptoms: call a POISON CENTER or doctor/physician.
P405 Store locked up.

Tricobalt tetraoxide price More Price(29)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 221643 Cobalt(II,III) oxide powder, <10μm 1308-06-1 50g $66 2017-11-08 Buy
Sigma-Aldrich 203114 Cobalt(II,III) oxide Nonstoichiometric compound., 99.995% trace metals basis 1308-06-1 5g $82.4 2017-11-08 Buy
Alfa Aesar 10695 Cobalt(II,III) oxide, Puratronic?, 99.9985% (metals basis) 1308-06-1 10g $113 2017-11-08 Buy
Alfa Aesar 10695 Cobalt(II,III) oxide, Puratronic?, 99.9985% (metals basis) 1308-06-1 50g $473 2017-11-08 Buy
Strem Chemicals 27-0480 Cobalt oxide-molybdenum oxide on alumina (3.5% CoO, 14% MoO3) 1308-06-1 500g $246 2017-11-27 Buy

Tricobalt tetraoxide Chemical Properties,Uses,Production


Tricobalt tetroxide is a minor component of commercial cobalt oxides. It is used in ceramics, pigments, and enamels. Other applications are in grinding wheels, in semiconductors, and for preparing cobalt metal.


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).


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

Chemical Properties

Black fine powder


In enamels; in semiconductors; in grinding wheels.

Tricobalt tetraoxide Preparation Products And Raw materials

Raw materials

Preparation Products

Tricobalt tetraoxide Suppliers

Global( 135)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20810 55
Sinopharm Chemical Reagent Co,Ltd. 86-21-63210123
86-21-63290778 86-21-63218885 China 9977 79
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933; China 96820 76
future industrial shanghai co., ltd 021-61552785,400-0066-400
021-55660885 China 2088 65
Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 China 30309 84
Beijing dtftchem Technology Co., Ltd. 13651141086; 86(10)60275028、60275820
86 (10) 60270825 China 3434 62
BeiJing Hwrk Chemicals Limted 4006990298;010-57411839;0757-86311057;021-51691807
010-87653215;0757-86311057;021-55236763 China 14833 55
Energy Chemical 021-58432009 / 400-005-6266
021-58436166-800 China 44192 61
Chengdu XiYa Chemical Technology Co., Ltd. 4008-626-111
028-84752058 China 9742 57
Tianjin heowns Biochemical Technology Co., Ltd. 400 638 7771 China 14544 57

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