- Potassium periodate
Potassium periodate has formula KIO4.
Density is 3,618 kg m-3. It melts at 581.85 °C and has a molecular weight of 230.0 g/mol.
It is slightly soluble in water (one of the less soluble of potassium salts, owing to a large anion), giving rise to a solution that is slightly
alkaline . On heating (especially withmanganese(IV) oxide as catalyst), it decomposes to form potassium iodate, releasing oxygen gas.The low solubility of KIO4 makes it useful for the determination of potassium.
Note that the pronunciation is per-iodate, not period-ate.
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