Potassium periodate is an inorganic salt with the molecular formula KIO4. It is composed of a potassium cation and a periodate anion and may also be regarded as the potassium salt of periodic acid. Note that the pronunciation is per-iodate, not period-ate.
3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||230.00 g mol−1|
|Appearance||white crystalline powder|
|Melting point||582 °C (1,080 °F; 855 K) (decomposes)|
|0.17 g/100 mL (0 °C) |
0.42 g/100 mL (20 °C)
4.44 g/100 mL (80 °C)
7.87 g/100 mL (100 °C)
|Occupational safety and health (OHS/OSH):|
|NFPA 704 (fire diamond)|
|Safety data sheet (SDS)||External MSDS|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
(what is ?)
The low solubility of KIO4 makes it useful for the determination of potassium and cerium.
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.
|first=has generic name (help)