  | |
| Names | |
|---|---|
| IUPAC name Ammonium iodate | |
| Other names Iodic acid, ammonium salt | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.033.252 |
| EC Number |
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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 theirstandard state (at 25 °C [77 °F], 100 kPa). | |
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.
Ammonium iodate can be obtained by neutralising a solution ofiodic acid withammonia.[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 anammonium hydroxide solution, instead the highly explosivenitrogen triiodide is formed.
Because ammonium iodate consists of the reducing ammonium ion and the oxidizing iodate ion, it already starts to decompose at 150 °C intonitrogen,oxygen,iodine andwater.
Below 60 °C this reaction cannot sustain itself, but with catalysts likepotassium dichromate orcopper(II) chloride it can also combust at room temperature.[2]
Like all iodates, ammonium iodate is a strong oxidizer and should therefore be kept away from flammable materials likesulfur,phosphorus and metals powders.[3]
