Summary
Ammonium iodate is an inorganic salt which is sparingly soluble in cold, and moderately soluble in hot water, like all iodate salts, it is a strong oxidizer.
 
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| Names | |
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| IUPAC name
Ammonium iodate
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| Other names
Iodic acid, ammonium salt
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3D model (JSmol)
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| ECHA InfoCard | 100.033.252 |
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| NH4IO3 | |
| Molar mass | 192.94 g/mol |
| Appearance | white crystalline powder |
| Density | 3.309 g/cm3 |
| Melting point | decomposes at 150 °C |
| 29.883 g/L (25 °C) [1] | |
| -62.3·10−6 cm3/mol | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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Preparation edit
Ammonium iodate can be obtained by neutralising a solution of iodic acid with ammonia.[2]
Using its low solubility in water, it can also be precipitated from an iodate solution with an ammonium salt.
Unlike other iodates, ammonium iodate can't be prepared by dissolving iodine in an ammonium hydroxide solution, instead the highly explosive nitrogen triiodide is formed.
Chemical properties edit
Because ammonium iodate consists of the reducing ammonium ion and the oxidizing iodate ion, it already starts to decompose at 150 °C into nitrogen, oxygen, iodine and water.
Below 60 °C this reaction cannot sustain itself, but with catalysts like potassium dichromate or copper(II) chloride it can also combust at room temperature.[2]
Safety edit
Like all iodates, ammonium iodate is a strong oxidizer and should therefore be kept away from flammable materials like sulfur, phosphorus and metals powders [3]
References edit
- ^ "Eigenschaften von Ammoniumiodat - Das Periodensystem online".
- ^ a b "Combustion of the Inorganic Salts Ammonium Iodate And Hydroxylamine Sulfate" (PDF). Archived from the original (PDF) on 2016-10-28. Retrieved 2016-10-28.
- ^ "Safety Data Sheet Ammonium iodate" (PDF). Alpha Aesar. 1 June 2012. Archived from the original (PDF) on 2016-10-29. Retrieved 2016-10-28.