CAS number : 35103-79-8
Molecular weight :167.93
Molecular formula/chemical symbol :HCsO.H2O
Description :
Orange powder or orange-red liquid
Caesium hydroxide (CsOH) is a chemical compound consisting of an atom of caesium and a hydroxide ion. It is a strong base (pKb=-1.76), much like other alkali metal hydroxides such as sodium hydroxide and potassium hydroxide. In fact, caesium hydroxide is powerful enough to quickly corrode through glass.
Due to its high reactivity, caesium hydroxide is extremely hygroscopic. Laboratory caesium hydroxide is typically a hydrate.
Caesium hydroxide |
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Identifiers |
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56494 Y |
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2682 |
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FK9800000 |
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Jmol-3D images |
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Properties |
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CsOH |
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149.912 g/mol |
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Appearance |
Whitish-yellow deliquescent crystals |
3.675 g/cm3 |
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342.3 °C |
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Solubility in water |
300 g/100 mL at 30 °C |
Basicity (pKb) |
-1.76[2] |
Thermochemistry |
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Std enthalpy of |
?416.2 kJ·mol-1 |
Standard molar |
104.2 J·K?1·mol?1 |
69.9 J·mol-1·K-1[3] |
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Hazards |
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EU Index |
Not listed |
Non flammable |
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Related compounds |
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Other anions |
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Other cations |
Lithium hydroxide |
Y (verify) (what is: Y/N?) |
USES :
Preparation of a variety of the raw material of the cesium salt,Glass ceramics industry.
Keywords:Fine ceramics
Report :
Product name |
Cesium hydroxide |
CAS:35103-79-8 |
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Description |
Whitish-yellow deliquescent crystals |
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TEST ITEMS |
TEST RESULTS |
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HCsO·H2O |
≥99.9% |
≥99.0% |
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Li |
≤0.001% |
≤0.001% |
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K |
≤0.05% |
≤0.1% |
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Na |
≤0.01% |
≤0.02% |
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Ca |
≤0.005% |
≤0.005% |
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Mg |
≤0.001% |
≤0.001% |
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Fe |
≤0.0005% |
≤0.001% |
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Al |
≤0.001% |
≤0.001% |
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SiO2 |
≤0.001% |
≤0.001% |
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Rb |
≤0.2% |
≤0.5% |
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Heavy metals (as Pb) |
≤0.0005% |
≤0.001% |