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Cesium hydroxide

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

Identifiers

CAS number

21351-79-1 

ChemSpider

56494 YesY

EC-number

244-344-1

UN number

2682

ChEBI

CHEBI:33988 YesY

RTECS number

FK9800000

Jmol-3D images

Image 1

Properties

Molecular formula

CsOH

Molar mass

149.912 g/mol

Appearance

Whitish-yellow deliquescent crystals

Density

3.675 g/cm3

Melting point

342.3 °C

Solubility in water

300 g/100 mL at 30 °C

Solubility

Soluble in ethanol[1]

Basicity (pKb)

-1.76[2]

Thermochemistry

Std enthalpy of
formation
ΔfHo298

?416.2 kJ·mol-1

Standard molar
entropy
So298

104.2 J·K?1·mol?1

Specific heat capacity, C

69.9 J·mol-1·K-1[3]

Hazards

MSDS

ICSC 1592

EU Index

Not listed

Flash point

Non flammable

Related compounds

Other anions

Caesium oxide
Caesium fluoride

Other cations

Lithium hydroxide
Sodium hydroxide
Potassium hydroxide
Rubidium hydroxide

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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

 

USES :

Preparation of a variety of the raw material of the cesium salt,Glass ceramics industry.

Keywords:Fine ceramics


Report :

Product name

Cesium hydroxide

CAS35103-79-8

Description

Whitish-yellow deliquescent crystals

TEST ITEMS

TEST RESULTS

HCsO·H2O

≥99.9

≥99.0

Li

≤0.001

≤0.001

K

≤0.05

≤0.1

Na

≤0.01

≤0.02

Ca

≤0.005

≤0.005

Mg

≤0.001

≤0.001

Fe

≤0.0005

≤0.001

Al

≤0.001

≤0.001

SiO2

≤0.001

≤0.001

Rb

≤0.2

≤0.5

Heavy metals (as Pb)

≤0.0005

≤0.001