Ammonium iodide

Ammonium iodide is the inorganic compound with the formula NH4I. A white solid. It is an ionic compound, although impure samples appear yellow. This salt consists of ammonium cation and an iodide anion. It can be prepared by the action of hydroiodic acid on ammonia. It is easily soluble in water, from which it crystallizes in cubes. It is also soluble in ethanol. Ammonium iodide in aqueous solutions are observed as acidic and display elevated vapor pressures at high temperatures

Preparation
Ammonium iodide can be made in lab by treating ammonia with hydroiodic acid:
 * NH3 + HI → NH4I

Uses
Ammonium iodide is used as  dietary supplement to treat iodine deficiency.

Properties and Reactions
Ammonium iodide has recently been used in many research studies and experiments.

Vinyl sulfones have been prepared using ammonium iodide,.

Organic reactions are not synthesized with organic solvents due to their increasing detrimental effects on the human body and ecosystem. Many chemists have altered organic reactions to exclude solvents in order to have successful sustainable syntheses. A report was presented on an organic synthesis for the iodination of ketones and aromatic compounds using ammonium iodide and H2O2 (hydrogen peroxide). This resulted in the products' high yields, which were gathered more efficiently, in a shorter duration compared to the use of the abrasive compound: molecular iodine