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Potassium periodate is an inorganic salt with the molecular formula KIO4.
P 2375 (OTTO) Potassium periodate, 99% Cas 7790-21-8 - used in colorimetric estimation of manganese. It reacts with ammonium cerium(IV) nitrate to prepare tris[trinitratocerium(IV)] paraperiodate which finds application as an oxidant.