CAS 7790-21-8 appears in our catalog under these names: Potassium periodate, 99% , Potassium periodate, ACS, 99.8%-100.3% , Potassium metaperiodate, 99+%, 99.00%, Potassium periodate, ACS reagent, Potassium periodate, 99.5%, extra pure. Offered by: Thermo Scientific (Alfa Aesar), Chemat, Thermo Scientific (Acros), Sigma-Aldrich, Fluorochem. Available pack sizes: 2500g, 100g, 500g, 25g, 2.5KG.