Sodium iodide dihydrate, 99.0+%

Sodium iodide (chemical formula NaI) is an ionic compound formed from the chemical reaction of sodium metal and iodine. Under standard conditions, it is a white, water-soluble solid comprising a 1:1 mix of sodium cations (Na+) and iodide anions (I−) in a crystal lattice. It is used mainly as a nutritional supplement and in organic chemistry.

It is produced industrially as the salt formed when acidic iodides react with sodium hydroxide.

Sodium iodide is used in radiation detection, treatment of iodine deficiency, and as a reactant in the Finkelstein reaction (conversion of an alkyl chlorides into an alkyl iodides).