COBALT(II) BROMIDE Chemical Properties

Melting point:

678°C

Density 

4.909 g/mL at 25 °C(lit.)

solubility 

acetone: soluble(lit.)

form 

beads

color 

Green

Specific Gravity

4.909

Water Solubility 

Soluble in water. Soluble in methyl acetate, ether, alcohol, acetone.

Sensitive 

Hygroscopic

Merck 

14,2435

Exposure limits

ACGIH: TWA 0.02 mg/m3

CAS DataBase Reference

7789-43-7(CAS DataBase Reference)

EPA Substance Registry System

Cobalt bromide (7789-43-7)

Safety Information

Hazard Codes 

T,Xn

Risk Statements 

45-20/21/22-36/37/38-42/43

Safety Statements 

36-45-36/37/39-26-22-53

RIDADR 

UN 3077 9 / PGIII

WGK Germany 

3

RTECS 

GF9595000

TSCA 

Yes

Hazardous Substances Data

7789-43-7(Hazardous Substances Data)

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

COBALT(II) BROMIDE Usage And Synthesis

Chemical Properties

Reddish violet crystalline powder

Chemical Properties

The green anhydrous salt is prepared by dehydration of the red hexahydrate or by the action of bromine on heated cobalt. It is very soluble in water and soluble in many polar organic solvents; it deliquesces in moist air to a red solution. The hexahydrate crystallizes from aqueous solution at room temperature; it melts at 100°, evolving water and forming the purple dihydrate.

Uses

Cobalt(II) bromide is used as a catalyst in organic synthesis. It is used as a precursor in the production of ethylsulfanyl)porphyrazinato)cobalt(II), which gives the possibility of intermolecular ferromagnetic interactions.

Uses

Used in the preparation of a new complex, Co(OESPz), which offers the possibility of intermolecular ferromagnetic interactions.1

Preparation

Cobalt(II) bromide (CoBr2) is on its anhydrous form a green solid that is soluble in water, used primarily as a catalyst in some processes. Cobalt(II) bromide can be formed as a hydrate by the reaction of cobalt hydroxide with hydrobromic acid.
 Co (OH) 2 (s)+2HBr (aq)→CoBr2.6H2O(aq) 

General Description

COBALT(II) BROMIDE is a red violet crystalline solid. COBALT(II) BROMIDE is soluble in water. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. COBALT(II) BROMIDE is used as a catalyst in the production of other chemicals.

Air & Water Reactions

Water soluble.

Reactivity Profile

Acidic salts, such as COBALT(II) BROMIDE, are generally soluble in water. The resulting solutions contain moderate concentrations of hydrogen ions and have pH's of less than 7.0. They react as acids to neutralize bases. These neutralizations generate heat, but less or far less than is generated by neutralization of inorganic acids, inorganic oxoacids, and carboxylic acid. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible. Many of these compounds catalyze organic reactions. When heated to decomposition can give off highly toxic fumes of Br [USCG, 1999].

Health Hazard

SOLID: Irritating to skin and eyes. Harmful if swallowed.

Fire Hazard

Not flammable. POISONOUS FUMES ARE PRODUCED WHEN HEATED TO DECOMPOSITION. When heated to decomposition can give off highly toxic fumes of Br.

Purification Methods

Crystallise it from water (1mL/g) by partial evaporation in a desiccator. The anhydrous salt is soluble in EtOH, Me2CO, MeOAc to form blue-coloured solutions. [Glemser in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p 1517 1965.]

COBALT(II) BROMIDE(7789-43-7)Related Product Information

• COBALT(II) BROMIDE,COBALT(II) BROMIDE HEXAHYDRATE,COBALT(II) BROMIDE HEXAHYDRATE, 99.5%,COBALT (II) BROMIDE, HYDROUS
• Cobalt(II) hydroxide
• Cobalt sulfate heptahydrate
• Nickel chloride
• IRON (II) FLUORIDE
• Copper(II) chloride
• Cuprous oxide
• Cobalt oxide
• Cobalt chloride
• Potassium dichromate
• COBALT(II) SULFATE HYDRATE
• COBALT(II) SULFATE HYDRATE
• Cobaltous nitrate hexahydrate
• COBALT(III) FLUORIDE
• Sodium acetate
• CERIC SULFATE
• Sodium sulfite
• Monosodium phosphate