COBALT(II) BROMIDE HYDRATE Property

Melting point:

47-48°C

Density 

2,462 g/cm³

form 

Crystals

Specific Gravity

～2.462

color 

Violet

Water Solubility 

Soluble in water.

Sensitive 

Hygroscopic

Merck 

14,2435

Exposure limits

ACGIH: TWA 0.02 mg/m3

InChIKey

MOTZAWYGLXXRSO-UHFFFAOYSA-L

CAS DataBase Reference

85017-77-2

Safety

Hazard Codes 

Xn

Risk Statements 

20/21/22-36/37/38

Safety Statements 

26-28-36/37/39-45

RIDADR 

UN 3077 9 / PGIII

WGK Germany 

3

RTECS 

GF9595000

F 

3

TSCA 

Yes

HS Code 

28275900

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

COBALT(II) BROMIDE HYDRATE Chemical Properties,Usage,Production

Chemical Properties

Red violet crystal.

Uses

Hygrometers, catalystsCobalt(II) bromide hydrate is mainly used as a catalyst in organic synthesis, like C-metal, C-heteroatom and C-C bond formations, addition to unsaturated bonds, cyclizations, polymerization, oxidations reductions and carbonylations. It reacts with ammonia to form coordination compound bromopentaamminecobalt(III) bromide. It reacts with triphenylphosphine and form complexes of cobalt(II) bromide, which used as a catalyst in organic synthesis.

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.]