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Cobalt(III) oxide black
Cas No: 1308-04-9
USD $ 3.0-3.0 / Kilogram 1 Kilogram 1-100 Metric Ton/Month Dayang Chem (Hangzhou) Co.,Ltd. Contact Supplier
Cobaltic oxide
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No Data No Data No Data Chemwill Asia Co., Ltd. Contact Supplier
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No Data 1 Kilogram 1 Metric Ton/Day Henan Tianfu Chemical Co., Ltd. Contact Supplier
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USD $ 139.0-210.0 / Kilogram 1 Kilogram 1000 Kilogram/Day Zhuozhou Wenxi import and Export Co., Ltd Contact Supplier
Cabalt trioxide CAS:1308-04-9 Safe delivery Free of customs clearance
Cas No: 1308-04-9
USD $ 1.0-10.0 / Kilogram 1 Kilogram 5000 Kilogram/Month WUHAN MULEI NEW MATERIAL CO., LTD Contact Supplier
Cobalt oxide (Co2O3) 1308-04-9
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No Data 1 Kilogram 10000 Metric Ton/Month Shanghai Upbio Tech Co.,Ltd Contact Supplier
Factory Supply High Purity CAS 1308-04-9 Co2o3 Powder Price Cobalt Oxide
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USD $ 35640.0-35700.0 / Metric Ton 1 Metric Ton 200 Metric Ton/Month Hebei Nengqian Chemical Import and Export Co., LTD Contact Supplier
Cobalt oxide (Co2O3)
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No Data No Data 10000 Metric Ton/Month Henan Wentao Chemical Product Co., Ltd. Contact Supplier
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No Data 1 Gram 100 Metric Ton/Day Shanghai Minstar Chemical Co., Ltd Contact Supplier
Cobalt oxide (Co2O3)
Cas No: 1308-04-9
No Data 1 Kilogram 1 Metric Ton/Day Shandong Hanjiang Chemical Co., Ltd. Contact Supplier

1308-04-9 Usage


Heating with hydrogen, carbon or carbon monoxide reduces the oxide to cobalt metal. Co2O3 + 3H2→ 2Co + 3H2O Co2O3 + 3CO→ 2Co + 3CO 2Co2O3 + 3C→ 4Co + 3CO2 Strong heating in air converts cobalt(III) oxide to tricobalt tetroxide. Reactions with mineral acids produce their Co3+ salts: Co2O3 + 6HCl → 2CoCl3 + 3H2O


Cobaltic oxide (Co2O3) is also known as cobalt oxide or cobalt black. It is dark gray to black and is used in pigments, ceramic glazes, and semiconductors.

Physical properties

Grayish black powder; density 5.18 g/cm3; decomposes at 895°C; insoluble in water; soluble in concentrated mineral acids.


Neither the oxide Co2O3 nor the hydroxide Co(OH)3 is definitely established. The oxidation of cobalt(II) hydroxide in aqueous suspension with, for example, peroxides, or the destruction of a cobalt(III) complex with alkali gives a brown or black powder Co2O3.aq which upon drying at 150° yields the monohydrate Co2O3.H2O; this is probably best formulated as CoO(OH). When heated further in attempts to dehydrate it, the "monohydrate" begins to evolve oxygen (as well as water) at 300° with the formation of black Co3O4. When heated to 100° in air cobalt(II) hydroxide is converted to dark brown CoO(OH).


Cobalt(III) oxide is prepared by heating cobalt compounds at low temperatures in air.

Safety Profile

: Moderately toxic by intraperitoneal and subcutaneous routes. Questionable carcinogen. Violent reaction with hydrogen peroxide. The oxide increases the sensitivity of nitroalkanes (e.g., nitromethane, nitroethane, and 1 nitropropane) to heat or detonation. See also COBALT COMPOUNDS.


COBALT(III) OXIDE BLACK is used as a pigment; for glazing porcelain and pottery; and for coloring enamels.


Pigment, coloring enamels, glazing pottery.


Sometimes incorrectly called cobalt peroxide.


COBALT(III) OXIDE BLACK is prepared by heating cobalt compounds at low temperatures in air.

Chemical Properties

Steel-gray or black powder.Soluble in concentrated acids; insoluble in water.



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017


1.1 GHS Product identifier

Product name Cabalt trioxide

1.2 Other means of identification

Product number -
Other names oxo(oxocobaltiooxy)cobalt

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Intermediates
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

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