Cadmium bromide

Cadmium bromide is the inorganic compound with the formula CdBr₂. It is a white hygroscopic solid. It also can be obtained as a mono- and tetrahydrate.^[2] It has few applications.

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) Y
3D model (JSmol)	Interactive image
ChemSpider	23011 Y
ECHA InfoCard	100.029.241
EC Number	232-165-1
PubChem CID	24609
RTECS number	EU9935000
UNII	7726AXS0WH Y
CompTox Dashboard (EPA)	DTXSID30895027
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 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.
Magnetic susceptibility (χ)	−87.3·10−6 cm3/mol
Structure
Crystal structure	Rhombohedral, hr9, SpaceGroup = R-3m, No. 166
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H312, H332, H410
Precautionary statements	P220, P273, P280, P501
NFPA 704 (fire diamond)	3 0 0
Lethal dose or concentration (LD, LC):
LD50 (median dose)	225 mg/kg, oral (rat)
NIOSH (US health exposure limits):
PEL (Permissible)	[1910.1027] TWA 0.005 mg/m3 (as Cd)[1]
REL (Recommended)	Ca[1]
IDLH (Immediate danger)	Ca [9 mg/m3 (as Cd)][1]
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). Y verify (what is YN ?) Infobox references

Preparation and structure

Cadmium bromide is prepared by heating cadmium with bromine vapor.^[2] The tetrahydrate has been obtained by crystallization of the dibromide from aqueous solution. At 3.04 g/cm³, it is much less dense than the anhydrous material. According to X-ray crystallography, the tetrahydrate is a polymer of CdBr₂(H₂O)₂ with bridging bromide ligands. There are two interstitial water molecules^[3]