Ammonium Iodide Formula, Preparation Method, Chemical Properties


Ammonium Iodide Formula: Structure, Properties, and Applications

Ammonium iodide is a chemical compound composed of ammonium and iodide ions. This compound has the chemical formula NH4l and is an important compound in the field of chemistry due to its unique properties and applications.

Structure of Ammonium Iodide

The ammonium ion is composed of one nitrogen atom and four hydrogen atoms. The iodide ion is composed of one iodine atom and one electron. In ammonium iodide, the ammonium ion and the iodide ion are bonded together through an ionic bond. This bond is formed between the positively charged ammonium ion and the negatively charged iodide ion.

Structural Formula

This is the structural formula of the ammonium iodide:

Ammonium Iodide Formula

Chemical Formula

The chemical formula of the ammonium iodide is NH4I.

Properties of Ammonium Iodide

Ammonium iodide is a white crystalline solid with a molecular weight of 149.88 g/mol. It is highly soluble in water and has a slightly acidic taste. At room temperature, ammonium iodide is a stable compound and does not readily undergo chemical reactions. However, it is sensitive to light and air and should be stored in a cool, dark, and dry place to maintain its stability.


Physical Properties

Melting point 551C
Boiling point 235C
Molecular weight 144.94g/mol
Density 2.51g/cm3
Solubility in water Soluble
Appearance White crystalline powder

Chemical Properties

When the crystallization starts by adding ammonia water with the amount of alcohol to obtain a precipitate of potassium sulfate. About 20 percent potassium sulfate combining the filtrates and finally we got the result ammonium iodide. It may sublime into the fire and then cooling on the cold surfaces. The toxic and irritating fumes of the nitrogen may result in the air.

Applications of Ammonium Iodide

Ammonium iodide has a wide range of applications in various fields such as medicine, agriculture, and research. In medicine, ammonium iodide is used as an expectorant to treat respiratory conditions. In agriculture, it is used as a fertilizer due to its high nitrogen content. In research, ammonium iodide is used as a reagent in the preparation of other chemical compounds and in the synthesis of organic compounds.

Furthermore, ammonium iodide is also used in the production of iodized salt, which is an important source of iodine for the human body. Iodine is an essential trace element that plays a crucial role in maintaining human health and preventing various iodine-deficiency disorders.


ammonium iodide is a versatile chemical compound with numerous applications in various fields. Its unique properties make it an important compound in the field of chemistry and its wide range of applications highlights its significance in everyday life.

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