CAS 38557-82-3 appears in our catalog under these names: 4-Pyridinecarboxamide 1-Oxide, >95% (HPLC), 4-Pyridinecarboxamide, 1-oxide, 97%, 97%, Isonicotinamide 1-oxide. Offered by: TRC, Chemat, Fluorochem. Available pack sizes: 500mg, 100mg, 250mg, 1g.