Cerium Ampoule


Characteristics: Liquid at slightly above room temperature; soft solid below melting point. Highly reactive. Decomposes in water, with evolution of hydrogen, which ignites instantly. Also reacts violently with oxygen, the halogens, sulfur, and phosphorus, with spontaneous ignition and/or explosion. Mohs hardness 0.2. Cesium has highest position in the electromotive series; it also has the lowest melting point of any alkali metal, and the lowest ionization potential of any element. Soluble in acids and alcohol. Low toxicity.

Derivation: By thermochemical reduction of CsCl with calcium, or by electrolysis of fused cyanide. Its chief ore is pollucite, found in Maine, S. Dakota, Manitoba, Elba, S. Africa.

Hazard: Dangerous fire and explosion risk. Ignites spontaneously in moist air; may explode in contact with sulfur or phosphorus. Reacts violently with oxidizing materials. Causes burns on contact with skin.

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Atomic Number:


Atomic Weight:



1.873 gm/cc

Melting Point:

28.40 oC

Boiling Point:

669.3 oC

Thermal Conductivity:

0.359 W/cm/K @ 298.2 K

Electrical Resistivity:

20 microhm-cm @ 20 oC


0.7 Paulings

Specific Heat:

0.057 Cal/g/K @ 25 oC

Heat of Vaporization:

16.3 K-Cal/gm atom at 669.3 oC

Heat of Fusion:

0.5 Cal/gm mole


alkali metal
Courtesy of Open University
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Alkali Metals

TYPICAL ANALYSES - Impurities in ppm

Material / Purity: 3N Material / Purity: 3N
Al 7 Fe 7
Mg 1 Mn <1
Ni <7 Pb <7
V <1 Ba <4
B <7 Ca 1
Cu <7 Cr <7
Si <7 Na <7
K <1 Rb <1
Be <1 Ag <1
Zr <13 Sn <7
Sr <1 Co <7
Ti <7 Mo <7






Glass Type

1 Gram

10.5 mm

50-52 mm


5 Gram

16.6 mm

70 mm


25 Gram

22.5 mm

115 mm


50 Gram

28.5 mm

160 mm





Cesium Metal 1 gm Pre-Scored Ampoule 3N+
Cesium Metal 5 gm Pre-Scored Ampoule 3N+
Cesium Metal 25 gm Pre-Scored Ampoule 3N+
Cesium Metal 0.5 gm Breakseal Ampoule 3N+
Cesium Metal 10 gm Breakseal Ampoule 3N+

Cesium metals are packaged in glass ampoules under argon and sold by the gram or kilogram. Call or This email address is being protected from spambots. You need JavaScript enabled to view it. for additional specifications or custom requirements.




Cesium Acetate CsC2H3O2  -100 Mesh msds1
Cesium Carbonate Cs2CO3  -20 Mesh msds1
Cesium Chloride CsCl  -60 Mesh msds1 2N
Cesium Chloride CsCl  -100 Mesh msds1 3N
Cesium Chromate CsCrO4  -20 Mesh msds1 3N
Cesium Fluoride CsF  -40 Mesh msds1 3N
Cesium Iodide CsI  -8 Mesh msds1 3N
Cesium Molybdate Cs2MoO4  -20 Mesh msds1 2N
Cesium Sulfate Cs2SO4  msds1

Compounds are packaged in glass ampoules under argon and sold by the gram or kilogram. Call or This email address is being protected from spambots. You need JavaScript enabled to view it. for additional specifications or custom requirements.


Material Safety Data Sheet - MSDS
Cesium MSDS
Technical Data Sheets
Understanding Mesh Sizes



Home Page Content Under Periodic Table


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