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:

HIO₃ + KOH ? KIO₃ + H₂O

It can also be prepared by adding iodine to a hot, concentrated solution of potassium hydroxide.

Sodium iodate(NaIO₃) is a chemical compound. Sodium 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 sodium-containing base such as sodium hydroxide with iodic acid, for example:

HIO₃ + KOH ? KIO₃ + H₂O

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

3 I₂ + 6 KOH ? KIO₃ + 5 KI + 3 H₂O