CAS 1304-76-3 appears in our catalog under these names: Bismuth(III) oxide, Puratronic½, 99.9995% (metals basis) , Bismuth(III) oxide, 99.975% (metals basis) , Bismuth(III) oxide, nanopowder, 99.9% , Bismuth(III) oxide, 99% , Bismuth(III) oxide, typically 99.99% (metals basis) . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 50g, 250g, 1kg, 25g, 100g, 500g, 5kg.