| Potassium iodate tablets
An unopened box of Potassium iodate
|Other names||iodic acid, potassium salt|
|Molar mass||214.00 g/mol|
|Appearance||white crystalline powder|
|Density and phase||3.89 g/cm³, solid|
|Solubility in water||32g/100ml (100°C)|
|Melting point|| 560°C |
|EU classification||not listed|
|Other anions|| potassium iodide|
|Other cations|| sodium iodate|
| Except where noted otherwise, data are given for|
materials in their standard state (at 25 °C, 100 kPa)
Infobox disclaimer and references
Potassium iodate (KIO3) is a chemical compound. It is sometimes used in radiation treatment, as it can replace radioactive iodine from the thyroid. See potassium iodide for more information on this use.
Potassium iodate is an oxidizing agent and as such it can cause fires if in contact with combustible materials or reducing agents. It can be prepared by reacting a potassium-containing base such as potassium hydroxide with iodic acid, for example:
It can also be prepared by adding iodine to a hot, concentrated solution of potassium hydroxide.
Potassium iodate is used for iodination of table salt, because iodide can be oxidized to iodine under wet conditions by oxygen. To prevent this US companies add thiosulfates or other antioxidants to the potassium iodide, while in some other countries potassium iodate is used as source for iodine.
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