7787-69-1

Basic information

• Product Name: Cesium bromide
• Synonyms: CESIUM BROMIDE;Caesium bromide;Caesiumbromide;Cesium bromide (CsBr);cesiumbromide(csbr);CsBr;Tricesium tribromide;tricesiumtribromide
• CAS NO: 7787-69-1
• Molecular Formula: BrCs
• Molecular Weight: 212.81
• EINECS: 232-130-0
• Product Categories: Analytical Reagents for General Use;C-D, Puriss p.a.;Puriss p.a.;Analytical Reagents;Atomic Absorption Spectroscopy (AAS);Digestion Reagents;Pure Salts for Melting Digestions (Trace SELECT)Analytical/Chromatography;Trace Analysis Reagents;CesiumBiochemicals and Reagents;AlphabeticalSynthetic Reagents;Biochemicals and Reagents;Density Gradient;Salts of Alkali Metals;Cesium Salts;CesiumMetal and Ceramic Science;Crystal Grade Inorganics;Inorganic Salts;Salts;Synthetic Reagents;metal halide;Cesium;Cesium Salts;Chemical Synthesis;Crystal Grade Inorganics;Cs;Inorganic Salts;Materials Science;Metal and Ceramic Science;Synthetic Reagents;Ultra-High Purity Materials
• Mol File: 7787-69-1.mol
• Article Data: 7

Chemical Properties

• Melting Point: 636 °C(lit.)
• Boiling Point: 1300 °C
• Flash Point: 1300°C
• Appearance: White/beads
• Density: 4.44 g/mL at 25 °C(lit.)
• Vapor Pressure: 20200mmHg at 25°C
• Refractive Index: 1.6984
• Solubility: H2O: 3 M at 20 °C, clear, colorless
• Water Solubility: 55 g/100 mL (20 ºC)
• Sensitive: Hygroscopic
• Stability: Stable.
• Merck: 14,2009
• CAS DataBase Reference: Cesium bromide(CAS DataBase Reference)
• NIST Chemistry Reference: Cesium bromide(7787-69-1)
• EPA Substance Registry System: Cesium bromide(7787-69-1)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26-36
• WGK Germany: 3
• RTECS: FK9275000
• TSCA: Yes
• Hazardous Substances Data: 7787-69-1(Hazardous Substances Data)

Usage

Chemical Properties

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

Uses

Different sources of media describe the Uses of 7787-69-1 differently. You can refer to the following data:
1. In x-ray fluorescent screens, spectrometer prisms, absorption-cell windows.
2. Cesium bromide (CsBr) crystals are used in scintillation counters to detect radiation. The compound is also used to coat the inside of fluorescent screens.
3. Cesium bromide is used as reagent, intermediate in pharmaceuticals.

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.

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.

InChI:InChI=1/BrH.Cs/h1H;/q;+1/p-1

Upstream product

• 10035-10-6 hydrogen bromide 
• 534-17-8 caesium carbonate 
• 13871-03-9 caesium bromide dichloride 
• 18278-82-5 caesium iodide dibromide 
• 15243-48-8 cesium lead bromide 
• 80937-33-3 oxygen 
• 7647-15-6 sodium bromide 
• 7550-35-8 lithium bromide 
• 15801-94-2 caesium diiodide bromide 
• 22325-19-5 Cs⁽¹⁺⁾*ClBrBr^(1-) = CsClBrBr 
• 13400-13-0 cesium fluoride 
• 15690-63-8 cesium chloride 
• 7558-02-3 potassium bromide 

Downstream Products

• 15243-48-8 cesium lead bromide 
• 15243-48-8 cesium lead bromide 
• 15243-48-8 cesium lead bromide 
• 15243-48-8 cesium lead bromide 
• 15243-48-8 CsPbBr₃ 
• 18041-25-3 cesium lead iodide 
• 15243-48-8 caesium lead bromide 

Relevant articles and documents

Crystal growth and characterization of Eu2+ doped Cs1-xRbxCaBr3

A series of Eu2+ doped Cs1-xRbxCaBr3 solid solutions were grown using the Bridgman-Stockbarger technique. Their photoluminescence and scintillation properties are studied. Upon optical and X-ray excitation, the Cs1-xRbxCaBr3 and Eu2+ activated samples show a band, which can be attributed to the 5d-4f transition in Eu2+. The decay time constants become shorter with increasing Rb content and lie in the range of 3–4 μs. The scintillation performance of solid solutions Cs1-xRbxCa0.95Eu0.05Br3 is improved compared with the end members (CsCa0.95Eu0.05Br3 and RbCa0.95Eu0.05Br3). The best energy resolution of 6.4% at 662 keV was determined for Cs0.2Rb0.8Ca0.95Eu0.05Br3, and the best light yield, equal to 61.2% of NaI:Tl, was demonstrated by Cs0.4Rb0.6Ca0.95Eu0.05Br3.

Hydrothermal Crystal Growth of Mixed Valence Cs2SbBr6

Mixed valence perovskite materials present an opportunity to understand how structural motifs influence electronic properties in semiconducting materials. Here, we report the preparation of high-quality single crystals of the mixed valence compound Cssub

Ion Exchange of Layered Alkali Titanates (Na2Ti3O7, K2Ti4O9, and Cs2Ti5O11) with Alkali Halides by the Solid-State Reactions at Room Temperature

Ion exchange of layered alkali titanates (Na2Ti3O7, K2Ti4O9, and Cs2Ti5O11) with several alkali metal halides surprisingly proceeded in the solid-state at room temperature. The reaction was governed by thermodynamic parameters and was completed within a shorter time when the titanates with a smaller particle size were employed. On the other hand, the required time for the ion exchange was shorter in the cases of Cs2Ti5O11 than those of K2Ti4O9 irrespective of the particle size of the titanates, suggesting faster diffusion of the interlayer cation in the titanate with lower layer charge density.