Cobalt(II) bromide

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Cobalt(II) bromide
Identifiers
CAS number	[7789-43-7]
Properties
Molecular formula	CoBr2
Molar mass	218.74 g/mol
Appearance	Green powder
Melting point	678C
Solubility in water	slight
Hazards
NFPA 704	0 2 0
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Cobalt(II) bromide is the bromide salt of divalent cobalt.

Contents 1 Properties 2 Preparation 3 Uses 4 Health issues 5 References

[edit] Properties

Cobalt(II) bromide appears as green crystals. The hydrate loses 4 H₂O at 100C and the rest at 130C. The anhydrous form melts at 678C.^[1][2]

[edit] Preparation

Cobalt(II) bromide can be prepared as a hydrate by the reaction of cobalt hydroxide with hydrobromic acid as follows:

Co(OH)₂(s) + 2HBr(aq) → CoBr₂(aq)

Anhydrous cobalt(II) bromide may be prepared through the direct reaction of solid cobalt with liquid bromine.^[3][4][5]

[edit] Uses

Cobalt(II) bromide may be used as a catalyst in the oxidation of some organic compounds with Cobalt(III).^[6]

[edit] Health issues

Exposure to large amounts of cobalt(II) can cause cobalt poisoning.^[7]

[edit] References