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Description
Cesium Bromide is an inorganic salt formed from the alkali metal cesium and bromide, known as a water-soluble crystalline solid. In the laboratory, this compound serves several fields at once: as a source of cesium ions in inorganic synthesis and catalysis, as a window and matrix material in infrared spectroscopy, and as a precursor to functional materials such as scintillators and halide perovskite compounds. The large ionic size of cesium and its strongly electropositive character cause this salt to behave differently from lighter alkali metal salts, which is precisely why it occupies a distinct place on the reagent shelf.
The property that makes cesium bromide a deliberate choice is the large cation effect well known in synthetic chemistry. The bulky cesium ion carries a low charge density and forms loose ion pairs, so its partner anion becomes more reactive in polar organic solvents and both reaction rate and selectivity can improve. In optics, cesium bromide crystals transmit radiation across a broad infrared range, making the material a preferred option for fabricating windows and measurement cells. The salt also possesses a high density, which is useful in preparing gradient solutions and in radiation-detecting materials.
In Indonesian laboratories, cesium bromide is typically found in inorganic and materials chemistry groups, in analytical facilities that operate infrared spectrometers, and in research units developing scintillator and perovskite materials. It is generally handled at the bench in small quantities, weighed out for synthesis work or prepared as solutions, and stored alongside other hygroscopic alkali halide salts. Academic, government, and industrial laboratories all draw on it for the same combination of ionic, optical, and density-related roles.
Laboratory Applications
- Inorganic synthesis and catalysis — supplies cesium ions whose low charge density forms loose ion pairs, raising anion reactivity and improving reaction rate and selectivity in polar organic solvents.
- Infrared spectroscopy windows and cells — cesium bromide crystals transmit radiation across a broad infrared range, making the material suitable for optical windows and measurement cells used in spectroscopic analysis.
- Infrared matrix preparation — serves as a matrix material for infrared spectroscopy sample presentation, exploiting the same broad-range transmission behavior that makes the salt valuable for optical components.
- Scintillator material research — acts as a precursor in preparing scintillator materials, where the salt's high density contributes directly to the performance of radiation-detecting materials.
- Halide perovskite precursor work — provides the cesium halide component required for synthesizing halide perovskite compounds, a functional material class in which cesium-based salts are a standard starting reagent.
Specifications
- Brand: TCI
- CAS Number: 7787-69-1
- Category: Chemistry > Catalysis and Inorganic Chemistry > Main-group Elements [Catalysis and Inorganic Chemistry]
- Product Code: C2202
- Physical Form: crystalline solid, soluble in water
- Storage: keep tightly closed in a dry place, away from moisture
Handling and Storage
Store cesium bromide in a tightly closed container in a dry, well-ventilated area, since alkali halide salts readily take up atmospheric moisture and may cake or lose optical quality if left exposed. Original manufacturer packaging, or tightly sealed glass or chemically compatible plastic containers, is suitable; a desiccator is advisable for material intended for infrared window or crystal work. Handle the solid in a laboratory setting with standard personal protective equipment, including safety glasses, gloves, and a laboratory coat, and weigh out material in a fume hood or a well-ventilated area to avoid dust inhalation. Keep the container clearly labelled, avoid contact with skin and eyes, and consult the manufacturer's safety data sheet before use and before disposing of any residues.
