Description Niobium Dioxide, 99% (Metals Basis), 10g For Research & Development Not for drug, human, animal, or food use Certificate of Analysis: Appearance (Color) Dark gray Appearance (Form) Powder Assay (by Complexometric, as Nb) >74.3% Assay (by Metals Basis) 99.0% ICP Analysis Confirms Nb component Melting Point 1915ºC Particle Size -200 mesh CAS: 12034-59-2 FORMULA: NbO2