Sodium iodate ( Na I O₃) is the sodium salt of

iodic acid Iodic acid is a white water-soluble solid with the chemical formula . Its robustness contrasts with the instability of chloric acid and bromic acid. Iodic acid features iodine in the oxidation state +5 and is one of the most stable oxo-acids of ...

. Sodium iodate is an oxidizing agent. It has few uses.

Preparation

It can be prepared by the reacting a sodium-containing base such as

sodium hydroxide Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations and hydroxide anions . Sodium hydroxide is a highly caustic base and alkali ...

with

, for example: : HIO₃ + NaOH → NaIO₃ + H₂O It can also be prepared by adding

iodine Iodine is a chemical element with the symbol I and atomic number 53. The heaviest of the stable halogens, it exists as a semi-lustrous, non-metallic solid at standard conditions that melts to form a deep violet liquid at , and boils to a vi ...

to a hot, concentrated solution of

sodium carbonate Sodium carbonate, , (also known as washing soda, soda ash and soda crystals) is the inorganic compound with the formula Na2CO3 and its various hydrates. All forms are white, odourless, water-soluble salts that yield moderately alkaline solutions ...

: :3 I₂ + 6 NaOH → NaIO₃ + 5

NaI Nai or NAI may refer to: Music * ''Nai'' (album), an album by singer Anna Vissi * Nai (pan flute), a wind instrument, also known as a pan flute (Romania and Moldova) * "Nai" (song), a 2007 CD single by Irini Merkouri Organizations * National A ...

+ 3 H₂O

Reactions

Sodium iodate can be oxidized to sodium periodate in water solutions by

hypochlorite In chemistry, hypochlorite is an anion with the chemical formula ClO−. It combines with a number of cations to form hypochlorite salts. Common examples include sodium hypochlorite (household bleach) and calcium hypochlorite (a component of ble ...

s or other strong oxidizing agents: :

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 The kilogram (also kilogramme) is the unit of mass in the International System of Units (SI), having the unit symbol kg. It is a widely used measure in science, engineering and commerce worldwide, and is often simply called a kilo colloquially ...

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.

References

{{Sodium compounds Iodates Sodium compounds Oxidizing agents