Sodium iodide

Sodium iodide is a chemical compound. It is composed of sodium and iodide ions. The chemical formula is NaI. It is a white crystalline solid. It is a weak reducing agent. When it is exposed to oxygen in the air, it turns yellow-brown. It does this because some of the iodide was oxidized to iodine. It is used to supply iodine to the human body.

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