Lanthanum Oxide, also called Lanthanum Sesquioxide or Lanthana, high purity Lanthanum Oxide (99.99% to 99.999%) is applied in making special optical glasses to improves the alkali resistance of glass, and also in La-Ce-Tb phosphors for fluorescent lamps. Low grade of Lanthanum Oxide is widely used in ceramics and FCC catalyst, and also as raw material for Lanthanum Metal production. Formula: La2O3 CAS No.: 1312-81-8 Molecular Weight: 325.82 Appearance: White Solubility: Insoluble in water, moderately soluble in strong mineral acids Stability: Strongly hygroscopic Purity: La2O3/TREO 99%-99.999% TREO≥99% LOI≤1% Rare Earth Impurities: Nd2O3≤5ug/g Sm2O3≤5ug/g Y2O3≤5ug/g Pb6O11≤2ug/g CeO2≤10ug/g Non Rare Earth Impurities: SiO2≤25ug/g Fe2O3≤1ug/g CaO≤20ug/g CuO≤3ug/g NiO≤3ug/g PrO≤10ug/g Cl-≤200ug/g