Sodium iodate

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Sodium iodate

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Template:Longitem	Template:Chembox Elements/molecular formula
Molar mass	Template:Chem molar mass
Appearance	White orthorhombic crystals
Odor	Odorless
Density	4.28 g/cm3
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Solubility	Soluble in acetic acid Insoluble in alcohol
Solubility in dimethylformamide	0.5 g/kg
Template:Longitem	−53.0·10−6 cm3/mol
Template:Longitem	Orthorhombic
Template:Longitem	125.5 J/mol·K
Template:Longitem	135 J/mol·K
Template:Longitem	−490.4 kJ/mol
NFPA 704 (fire diamond)	Template:NFPA 704 diamond
Template:Longitem	Sodium iodide Sodium periodate Sodium bromate Sodium chlorate
Template:Longitem	Potassium iodate Silver iodate

Sodium iodate (NaIO₃) is the sodium salt of iodic acid. Sodium iodate is an oxidizing agent. It has several uses.

Preparation

It can be prepared by reacting a sodium-containing base such as sodium hydroxide with iodic acid, for example:

HIO₃ + NaOH → NaIO₃ + H₂O

It can also be prepared by adding iodine to a hot, concentrated solution of sodium hydroxide or sodium carbonate:

3 I₂ + 6 NaOH → NaIO₃ + 5 NaI + 3 H₂O

Reactions

Sodium iodate can be oxidized to sodium periodate in water solutions by hypochlorites or other strong oxidizing agents:

NaIO₃ + NaOCl → NaIO₄ + NaCl

Uses

The main use of sodium iodate in everyday life is in iodised salt. The other compounds which are used in iodised table salt are potassium iodate, potassium iodide, and sodium iodide. Sodium iodate comprises 15 to 50 mg per kilogram of applicable salt.

Sodium iodate is also used as a dough conditioner to strengthen the dough.

Safety

Iodates combined with organic compounds form an explosive mixture.