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COBALT(III) OXIDE BLACK

Basic information Uses Preparation Reactions Safety Related Supplier

COBALT(III) OXIDE BLACK Basic information

Product Name:
COBALT(III) OXIDE BLACK
CAS:
1308-04-9
MF:
Co2O3
MW:
165.86
EINECS:
215-156-7
Mol File:
1308-04-9.mol
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COBALT(III) OXIDE BLACK Chemical Properties

Melting point:
895 °C (dec.)(lit.)
Density 
6.11 g/mL at 25 °C(lit.)
form 
powder
Water Solubility 
insoluble H2O; soluble conc acids [HAW93]
EPA Substance Registry System
Cobalt oxide (Co2O3) (1308-04-9)
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Safety Information

Hazard Codes 
Xn
Risk Statements 
36/37/38-40-43-22
Safety Statements 
26-36/37/39-36/37
WGK Germany 
1
RTECS 
GG2500000

MSDS

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COBALT(III) OXIDE BLACK Usage And Synthesis

Uses

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

Preparation

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

Reactions

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

Chemical Properties

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

Uses

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.

Uses

Pigment, coloring enamels, glazing pottery.

Definition

Sometimes incorrectly called cobalt peroxide.

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.

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COBALT(III) OXIDE BLACKSupplierMore

Beijing dtftchem Technology Co., Ltd.
Tel:
010-60275820-
Email:
dtftchem@sina.com;
BeiJing Hwrk Chemicals Limted
Tel:
21-51691807-
Email:
peter.shi@hwrkchemical.com;
JinYan Chemicals(ShangHai) Co.,Ltd.
Tel:
13817811078,021-50426030
Email:
sales@jingyan-chemical.com
Shanghai Hanhong Scientific Co.,Ltd.
Tel:
021-54306202- ;021-54308259
Email:
info@hanhonggroup.com;info@hanhonggroup.com;
Chengdu XiYa Chemical Technology Co., Ltd.
Tel:
Email:
sale@xiyashiji.com
Basic information Uses Preparation Reactions Safety Related Supplier