Terbium Oxide, also called Terbia, has important role as an activator for green phosphors used in colour TV tubes. Meanwhile Terbium Oxide is also used in special lasers and as a dopant in solid-state devices. Formula: Tb4O7 CAS No.: 12037-01-3 Molecular Weight: 747.69 Appearance: Brown Solubility: Insoluble in water, moderately soluble in strong mineral acids Stability: Slightly hygroscopic Purity: Tb4O7/TREO 99.95%-99.995% TREO≥99% LOI≤1% Non Rare Earth Impurities: CuO≤10ug/g CaO≤10ug/g PbO≤5ug/g Cl-≤100ug/g SiO2≤25ug/g NiO≤5ug/g Fe2O3≤5ug/g