CAS 16774-21-3 appears in our catalog under these names: Cerium(IV) ammonium nitrate, 98+% , Cerium(IV) ammonium nitrate, ACS, 98.5% min , Cerium(IV) ammonium nitrate, REacton½, 99.5% (REO) . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 1000g, 50g, 250g, 100g, 500g, 2kg, 10g.