Caesium Chloride 99.5%

What is Caesium Chloride 99.5%? Caesium chloride or cesium chloride is the inorganic compound with the formula CsCl. This colorless salt is an important source of caesium ions in a variety of niche applications. Caesium Chloride is an alkali halide salt, more common examples of alkali metal halides include Sodium Chloride (NaCl, table salt) and Magnesium Chloride (MgCl)

High-Quality Formulation: We use only carefully sourced Caesium chloride to ensure our customers can safely use it for various applications.

No Additives: We prioritise purity, delivering only the highest quality for our customers - you can trust that our product has no preservatives or additives.

Manufactured in the UK: Our Caesium chloride is bottled using non-toxic, chemical resistant bottles, providing reliable and trusted quality to our customers.

Frequent Uses

Chemical Reactions and Synthesis

Caesium chloride is the main precursor to caesium metal by high-temperature reduction:

2 CsCl (l) + Mg (l) → MgCl2 (s) + 2 Cs (g)
A similar reaction – heating CsCl with calcium in vacuum in presence of phosphorus – was first reported in 1905 by the French chemist M. L. Hackspill and is still used industrially

Caesium hydroxide is obtained by electrolysis of aqueous caesium chloride solution:

2 CsCl + 2 H2O → 2 CsOH + Cl2 + H2

Solute for ultracentrifugation

Caesium chloride is widely used in centrifugation in a technique known as isopycnic centrifugation. Centripetal and diffusive forces establish a density gradient that allow separation of mixtures on the basis of their molecular density. This technique allows separation of DNA of different densities (e.g. DNA fragments with differing A-T or G-C content).[31] This application requires a solution with high density and yet relatively low viscosity, and CsCl suits it because of its high solubility in water, high density owing to the large mass of Cs, as well as low viscosity and high stability of CsCl solutions.

Analytical chemistry

Caesium chloride is a reagent in traditional analytical chemistry used for detecting inorganic ions via the color and morphology of the precipitates. Quantitative concentration measurement of some of these ions, e.g. Mg2+, with inductively coupled plasma mass spectrometry, is used to evaluate the hardness of water.

Common uses:

• Precursor of Caesium metal and as a source of Caesium ions for various reactions
• Solute for ultracentrifugation
• Organic chemistry
• Analytical chemistry

Minimum Assay: >99.5%
Chemcial Formula: CsCl 
Molecular Weight: 168
Melting Point: 646 deg C
Boiling Point: 1303 deg C
Sodium (Na): <3mg/Kg
Potassium (K): <10mg/Kg
Iron (Fe): <0.2mg/Kg
Calcium (Ca): <0.1mg/Kg
Sulphates (SO4): <25mg/Kg
Magnesium (Mg): <0.1mg/Kg
Aluminium (Al): <0.2mg/Kg
Barium (Ba): <1.0mg/Kg
Silicon Dioixde (SiO2): <2mg/Kg
Strontium (Sr): <0.3mg/Kg
Chromium (Cr): <0.2mg/Kg
Manganese (Mn): <0.1mg/Kg
Lithium (Li): <0.2mg/Kg
Rubidium (Rb): <16mg/Kg

Cas Number: 7647-17-8

Einecs Number: 231-600-2

Hazard Phrases: H361

Prec Phrases: P280