Potassium periodate

Potassium periodate has formula KIO₄.

Additional recommended knowledge

Weighing the right way

What is the Correct Way to Check Repeatability in Balances?

Daily Sensitivity Test

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 with manganese(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.