Gadolinium Oxide, also called Gadolinia, is used for making optical glass and gadolinium yttrium garnets which have microwave applications. High purity of Gadolinium Oxide is used for making phosphors for colour TV tube. Formula: Gd2O3 CAS No.: 12064-62-9 Molecular Weight: 362.50 Appearance: White Solubility: Insoluble in water, moderately soluble in strong mineral acids Stability: Slightly hygroscopic Purity: Gd2O3/TREO 99.9-99.999% TREO≥99% LOI≤1% Rare Earth Impurities: Nd2O3≤5ug/g Sm2O3≤2ug/g Non Rare Earth Impurities: CuO≤5ug/g CaO≤1ug/g SiO2≤3ug/g NiO≤2ug/g Cl-≤50ug/g