CAS 7446-07-3 appears in our catalog under these names: Tellurium(IV) oxide, tech. , Tellurium(IV) oxide, Puratronic«, 99.999% (metals basis) , Tellurium(IV) oxide, 99.99% (metals basis) , Tellurium(IV) oxide, 99.995% (metals basis) . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 50g, 250g, 25g, 100g, 500g, 10g.