Cesium bromide Chemical Properties

Melting point:

636 °C (lit.)

Boiling point:

1300 °C

Density 

4.44 g/mL at 25 °C (lit.)

refractive index 

1.6984

Flash point:

1300°C

solubility 

H₂O: 3 M at 20 °C, clear, colorless

form 

beads

color 

White

Specific Gravity

4.44

Water Solubility 

55 g/100 mL (20 ºC)

Sensitive 

Hygroscopic

Merck 

14,2009

Stability:

Stable.

CAS DataBase Reference

7787-69-1(CAS DataBase Reference)

NIST Chemistry Reference

Cesium bromide(7787-69-1)

EPA Substance Registry System

Cesium bromide (CsBr) (7787-69-1)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

WGK Germany 

3

RTECS 

FK9275000

TSCA 

Yes

HS Code 

28275900

Toxicity

LD50 i.p. in rats: 1.4 g/kg (Cochran)

MSDS

• Language:English Provider:Cesium bromide
• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

Cesium bromide Usage And Synthesis

Structure

Cesium bromide (CsBr) is Tetraauricupride structured and crystallizes in the cubic Pm̅3m space group. Cs¹⁺ is bonded in a body-centred cubic geometry to eight equivalent Br¹⁻ atoms. All Cs-Br bond lengths are 3.75 Å. Br¹⁻ is bonded in a body-centered cubic geometry to eight equivalent Cs¹⁺ atoms.

Description

Cesium bromide is a colorless crystal with the formula CsBr. It is a moderately water soluble crystalline Cesium source that decomposes to Cesium oxide on heating. Most metal bromine compounds are water-soluble and are used in water treatment, chemical analysis, and ultra-high purity for certain crystal growth applications.

Chemical Properties

Cesium bromide is a colourless crystals. It has been used in protein crystallization for anamolous scattering.

Uses

In x-ray fluorescent screens, spectrometer prisms, absorption-cell windows.

Uses

Cesium bromide is used as reagent, intermediate in pharmaceuticals.

Uses

Cesium bromide (CsBr) crystals are used in scintillation counters to detect radiation. The compound is also used to coat the inside of fluorescent screens.

Preparation

Caesium bromide can be prepared via following reactions:
Neutralization:
CsOH (aq) + HBr (aq) → CsBr (aq) + H2O (l)
Cs2(CO3) (aq) + 2 HBr (aq) → 2 CsBr (aq) + H2O (l) + CO2 (g)
Direct synthesis:
2 Cs (s) + Br2 (g) → 2 CsBr (s)
The direct synthesis is a vigorous reaction of caesium with other halogens. Due to its high cost, it is not used for preparation.

Production Methods

Single crystals Cesium bromide can be synthesized by the Kyropoulus method or the Stockbarger method. One can polish the crystal using pure alcohol.

Safety Profile

Moderately toxic by intraperitoneal route. See also CESIUM and BROMIDES. When heated to decomposition it emits toxic fumes of Br-.

Purification Methods

It is very soluble in H2O, soluble in EtOH but insoluble in Me2CO. Dissolve it in the minimum volume of H2O, filter and precipitate it by adding Me2CO. Filter off the solid and dry it at 100o. Also recrystallise it from water (0.8mL/g) by partial evaporation in a desiccator.

Structure and conformation

The space lattice of CsBr(Cesium bromide) belongs to the cubic system, and its cesium chloride structure has a lattice constant of a=0.429 nm.

Cesium bromide(7787-69-1)Related Product Information

• Clidinium bromide
• Ethidium bromide
• Sodium bromate
• Sodium bromide
• Cesium nitrate
• 2,2,6,6-TETRAMETHYL-3,5-HEPTANEDIONATO CESIUM [CS(TMHD)]
• Cesium chloride
• Caesium fluoride
• CESIUM DODECAHYDRODODECABORATE
• Cesium carbonate
• CESIUM HYDROXIDE, HYDRATE (99.9%-CS)
• Cesium sulfate
• NEODYMIUM(III) BROMIDE HYDRATE
• TITANIUM(IV) BROMIDE
• Magnesium bromide hexahydrate
• Cerium(III) bromide hydrate
• TIN (II) BROMIDE
• Manganese(II) bromide tetrahydrate
• Caesium Bromide