Cadmium bromide

Cadmium bromide

Names
IUPAC name Cadmium(II) bromide
Other names Cadmium dibromide
Identifiers
CAS Number	7789-42-6 Y 13464-92-1 (tetrahydrate)
ChemSpider	23011 Y
Jmol 3D model	Interactive image
PubChem	24609
RTECS number	EU9935000
UNII	7726AXS0WH Y
InChI InChI=1S/2BrH.Cd/h2*1H;/q;;+2/p-2 Y Key: KPWJBEFBFLRCLH-UHFFFAOYSA-L Y InChI=1/2BrH.Cd/h2*1H;/q;;+2/p-2 Key: KPWJBEFBFLRCLH-NUQVWONBAB
SMILES Br[Cd]Br
Properties
Chemical formula	CdBr2
Molar mass	272.22 g/mol
Appearance	white to pale yellow crystalline solid
Density	5.192 g/cm3, solid
Melting point	568 °C (1,054 °F; 841 K)
Boiling point	844 °C (1,551 °F; 1,117 K)
Solubility in water	56.3 g/100 mL (0 °C) 98.8 g/100 mL (20 °C) 160 g/100 mL (100 °C)
Solubility	soluble in alcohol, ether, acetone and liquid ammonia.
Structure
Crystal structure	Rhombohedral, hr9, SpaceGroup = R-3m, No. 166
Vapor pressure	{{{value}}}
Related compounds
Other anions	Cadmium chloride, Cadmium iodide
Other cations	Zinc bromide, Calcium bromide, Magnesium bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Cadmium bromide is a cream-coloured crystalline ionic cadmium salt of hydrobromic acid that is soluble in water. It is very toxic, along with other cadmium compounds.

Uses

It is used in the manufacturing of photographic film, engraving and lithography.

Preparation

Cadmium bromide is prepared by heating cadmium with bromine vapor. Also the compound can be prepared by the treatment of dry cadmium acetate with glacial acetic acid and acetyl bromide. Alternatively, it can be obtained by dissolving cadmium or cadmium oxide in hydrobromic acid and evaporating the solution to dryness under helium in an inert atmosphere.