CAS 12037-29-5 appears in our catalog under these names: Praseodymium(III, IV) oxide, REacton|r, 99.996% (REO) , Praseodymium(III, IV) oxide, 99.5% (REO) , Praseodymium(III, IV) oxide, REacton|r, 99.99% (REO) , Praseodymium(III, IV) oxide, 99.9% (REO) , Praseodymium(III, IV) oxide, 99% (REO) . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 5g, 25g, 100g, 1kg, 10g, 50g, 250g.