CAS 1314-61-0 appears in our catalog under these names: Tantalum(V) oxide, Puratronic|r, 99.993% (metals basis exclu, Tantalum(V) oxide, Spectrographic Grade, 99.5% (metals basis. Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 25g, 100g, 500g.