Element Cerium

Cerium ElementCerium was the first of the lanthanides to be discovered, in Bastnäs, Sweden, by Jöns Jakob Berzelius and Wilhelm Hisinger in 1803, and independently by Martin Heinrich Klaproth in Germany in the same year.
An element of the rare earth family of metals. It has the atomic symbol Ce, atomic number 58, and atomic weight 140. 12.
Element Cerium is a malleable metal used in many industrial applications including catalysts, additives to fuel to reduce emissions, and to glass and enamels to change their color.

Names and Identifiers

Chemical Formula:Ce
CAS:7440-45-1
Molecular Weight:140.11600 g/mol
EC Number :231-154-9
MDL Number:MFCD00010924
Color:silvery white/ gray
Other Names:Cerio
PubChem CID:23974
IUPAC Name:Cerium
Inchl:InChI=1S/Ce
InChI Key:GWXLDORMOJMVQZ-UHFFFAOYSA-N
Canonical SMILES:[Ce]
ICSC Number:1405

Physical & Chemical Properties

Phase:Solid
Density:6 .770 g/cm³
Boiling Point:3716 K ​(3443 °C, ​6229 °F)
Melting Point:1068 K ​(795 °C, ​1463 °F)
Molecular Formula:Ce
Flash Point:n/a
Exact Mass:139.90500
Symbol:Globally Harmonized System of ClassificationGlobally Harmonized System of Classification
Signal Word:Danger
Hazard Statements:H228-H302-H312-H315-H319-H332-H335
Precautionary Statements:C: Corrosive;
Hazard Codes:22-23-36/38
Risk Phrases:26-36
Safety Phrases:UN 2031 8/PG 2
RIDADR:UN 2031 8/PG 2
WGK Germany:3
RTECS:n/a
Packaging Group:III
Hazard Class:n/a

Naturally occurring isotopes

IsotopeMass/DaNatural abundance (atom %)Nuclear spin (I)Magnetic moment (μ/μN)
136Ce135.907140 (50)0.185 (2)0
138Ce137.905985 (12)0.251 (2)0
140Ce139.905433 (4)88.450 (51)0
142Ce141.909241 (4)11.114 (51)0

Radiosotope data

IsotopeMass/DaHalf-lifeMode of decayNuclear spinNuclear magnetic moment
134Ce133.90903.16 dEC to 134La0
135Ce134.9091517.7 hEC to 135La1/2
137Ce136.907889.0 hEC to 137La3/2
139Ce138.90665137.6 dEC to 139La3/20.9
141Ce140.90827232.50 dβ to 139La7/21.1
143Ce142.9123821.38 dβ to 143La3/2
144Ce143.913643284.6 dβ to 144La0

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