Cerium is a chemical element with the symbol Ce and atomic number 58. Cerium is a soft, ductile, and silvery-white metal that tarnishes when exposed to air. Cerium is the second element in the lanthanide series, and while it often shows the oxidation state of +3 characteristic of the series, it also has a stable +4 state that does not oxidize water. It is also considered one of the rare-earth elements. ATT provides Cerium and compounds at a competitive price, including Cerium Acetate, Cerium Ammonium Nitrate, Cerium Ammonium Sulfate, Cerium Carbonate, Cerium Chloride, Cerium Fluoride, Cerium Hydroxide, Cerium Metal, Cerium Mischmetal, Cerium Nitrate, Cerium Oxalate, Cerium Oxide, Cerium Oxide Polishing Powder, Cerium Phosphat..