Potassium iodate
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| Potassium iodate | |
|---|---|
| Image:Potassium iodate tablets.jpg
An unopened box of Potassium iodate | |
| General | |
| Other names | iodic acid, potassium salt |
| Molecular formula | KIO3 |
| Molar mass | 214.00 g/mol |
| Appearance | white crystalline powder |
| CAS number | [7758-05-6] |
| Properties | |
| Density and phase | 3.89 g/cm³, solid |
| Solubility in water | 32g/100ml (100°C) |
| Melting point | 560°C partial decomposition |
| Boiling point | ? |
| Hazards | |
| EU classification | not listed |
| NFPA 704 |
 0
1
1
|
| Related compounds | |
| Other anions | potassium iodide potassium periodate potassium bromate potassium chlorate |
| Other cations | sodium iodate silver 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.
Like potassium bromate, potassium iodate is occasionally used as a maturing agent in baking.
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.
3 I2 + 6 KOH → KIO3 + 5 KI + 3 H2O
Conditions/substances to avoid include: heat, shock, friction, combustible materials, reducing materials, aluminum, organic compounds, carbon, hydrogen peroxide and sulfides.
Use
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.
External links
Template:Inorganic-compound-stubAcknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
