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Cesium Chloride
Other Names: Caesium chloride, CsCl

CAS Number: 7647-17-8
Sum Formula: CsCl
Molar Mass: 168.36 g/mol
Appearance: White crystalline solid or powder

Cesium chloride is an inorganic compound consisting of cesium and chloride ions. It crystallizes in a simple cubic lattice structure and is highly soluble in water. It is commonly used in analytical chemistry, molecular biology, and materials science.

Chemical and Physical Properties
Density: 3.99 g/cm³
Melting Point: 645°C
Boiling Point: 1297°C
Solubility in Water: 1860 g/L at 20°C (very soluble)
Solubility in Other Solvents: Slightly soluble in ethanol; insoluble in ether
Odor: Odorless

Applications
Analytical Chemistry: Used in density gradient centrifugation for nucleic acid and virus separation.
Material Science: Precursor in crystal growth and optical applications.
Electronics: Occasionally used in the preparation of scintillation crystals and other specialty materials.
Radiological Studies: Sometimes used in isotope form (e.g., Cs-137) for calibration and tracing in radiation-based applications.

Safety

Signal Word: Warning

Handling and Storage
Storage Conditions: Store in a tightly sealed container in a cool, dry, and well-ventilated area. Protect from moisture and incompatible materials such as strong oxidizing agents.
Handling Precautions: Avoid dust generation and contact with eyes or skin. Use appropriate personal protective equipment and ensure adequate ventilation.