Cobalt Hydroxide

Cobalt hydroxide Co(OH)2 is a chemical compound composed with cobalt and hydroxide ion. Commercial catalyst grade will have porous structure for high catalyst effect in refining and petrochemical. It is used as a dryer in paint, inks and varnish and preparation of other cobalt compounds. It consists of high cobalt content 61.5 %.

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Detailed Description for Cobalt Hydroxide

Cobalt hydroxide Co(OH)2 have high cobalt content (61.5%). Commercial catalyst grade has porous structure for more catalyst outcome in refining and petrochemical. It is used as a dryer in paint and varnish. Cobalt(II) hydroxide or cobaltous hydroxide is the chemical compound composed with cobalt and the hydroxide ion with the formula Co(OH)2. It mainly occurs in two forms, either as a rose-red powder, which is the more stable of the two forms, or as bluish-green powder. It have the cadmium or brucite iodide crystal structure.

Cobalt(II) hydroxide is precipitated when an alkaline hydroxide is additionally added into an aqueous solution of Co2+ ions:

CoCl2 (aq) + 2 NaOH Co(OH)2 (s) + 2 NaCl

Cobalt(II) hydroxide decomposes to cobalt(II) oxide at 168 degree C under vacuum and is oxidized by air to form cobalt(III) hydroxide, Co(OH)3.The thermal decomposition product in air above 300 degree C is Co3O4.

Like iron(II) hydroxide, cobalt(II) hydroxide is primarily a basic hydroxide, even though it does form the weakly acidic reddish hexaaquacobalt(II) ion, [Co(H2O)6]2+, in acidic aqueous solutions. In tough bases, cobalt(II) hydroxide accepts additional hydroxide ions to form dark blue cobaltates(II) [Co(OH)4]2− and [Co(OH)6]4

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE

Red crystal

MELTING POINT

Decomposes

BOILING POINT

 

SPECIFIC GRAVITY

 

SOLUBILITY IN WATER

 

pH

 

VAPOR DENSITY

 

AUTOIGNITION

 

NFPA RATING

Health: 2, Flammability: 0, Reactivity: 0

FLASH POINT

 

REFRACTIVE INDEX

 

STABILITY

Stable under ordinary conditions

 

Cobalt Hydroxide

Molecular Formula: Co(OH)2, Molecular Weight:92.95

Specifications:

Name of Index

Index

The cobalt(Co )

% ≥

59-61

60.6

Nickel(Ni )

% ≤

0.02

0.008

Copper(Cu )

% ≤

0.01

0.006

Calcicom(Ca )

% ≤

0.01

0.005

K+Na

% ≤

0.02

0.005

Iron(Fe )

% ≤

0.01

0.002

Aluminum(Al )

% ≤

0.02

0.01

Magnesium(Mg )

% ≤

0.01

0.005

Manganese(Mn )

% ≤

0.01

0.002

Properties:red roses, amorphous powder. 3.597g/cm3 density. Ammonium salt and soluble acid solution do not dissolve in water and dilute alkali solution.

Uses:Used for system cobalt catalyst ,cobalt salt, battery electrode solution saturated with paint and desiccant.

 

Uses:

It finds use as a drying agent for paints, inks and varnishes, in the preparation of other cobalt compounds, as a catalyst and in the manufacturing of electrodes of battery.

 

 


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