Cerium
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An element of the rare earth family of metals. It has the atomic symbol Ce, atomic number 58, and atomic weight 140.12. Cerium is a malleable metal used in industrial applications.  a rare earth metal; Ce-140   
SubstanceCAS Registry & nameCategoriesSourceDrugs*
cerium nitrate [ cerium nitrate (Ce(+3)),cerium nitrate (Ce(+4)) ] 17309-53-4   *Cerium
Pharma Action Anti-Infective Agents, Local
J Clin Hosp Pharm 1981;6(4):233