Sodium periodate

Sodium periodate is an inorganic salt, composed of a sodium cation and the periodate anion. It may also be regarded as the sodium salt of periodic acid. Like all periodates it can exist in two different forms: sodium metaperiodate, which has the formula NaIO₄, and sodium orthoperiodate, normally this means sodium hydrogen periodate (Na₂H₃IO₆) but the fully reacted sodium orthoperiodate salt, Na₅IO₆, can also be prepared. Both salts are useful oxidising agents.