The formula for sodium iodide is NaI. Its molar mass is 149.89 grams per mole. It is a white solid substance with a density of 3.67 grams per cubic centimeter. Its melting point is 1,222 degrees Fahrenheit, and its boiling point is 2,379 degrees Fahrenheit.
Sodium iodide has a solubility in water of 184 grams per 100 milliliters at 77 degrees Fahrenheit. It takes part in the Finkelstein reaction, in which an alkyl chloride is converted into an alkyl iodide. People who suffer from iodine deficiencies use sodium iodide as a food supplement. It is also an ingredient in iodized table salt.