Magnesium Iodide, Formula, Chemical Properties, Preparation, Uses

Magnesium Iodide

Magnesium iodide is a chemical compound which has consists the hydrates and it does not dissolve in the water. By treating with the hydroidic acid it can bes synthesized by using magnesium oxide as the catalyst. It is the combination of the magnesium and iodide. Typically it is the ionic halides and being highly soluble in the water. It can decomposed at the highly moderate temperatures. The systematic IUPAC name is known as magnesium iodide . The chemical or molecular formula of magnesium iodide is MgI2.

Structural Formula

This is the structural formula of the magnesium iodide:

Magnesium Iodide

Chemical Formula

The chemical formula of the magnesium iodide is MgI2.

Preparation Method

There are the three methods to producing the magnesium oxide. They are as follows. When the magnesium oxide is reacted with the hydrogen iodide it gives the magnesium iodide as the product and water as the byproduct. The magnesium hydroxide is reacted with the hydrogen iodide it gives the magnesium iodide is the product and water is the byproduct. Also the magnesium carbonate is reacted with the hydrogen iodide it forms the magnesium oxide as product and carbon dioxide and water as the byproduct.

Learn More:   Potassium Nitrate, Formula, Chemical Properties, Preparation, Uses

MgO + 2HI → MgI2 +H2O

Mg(OH)2 + 2HI → MgI2 +2 H2O

MgCO3 + 2 HI → MgI2 + CO2 + H2O

Physical Properties

Melting point 637C
Boiling point Decomposes
Molecular weight 278.1139g/mol
Density 4.43g/cm3
Solubility in water 54.7g/100mL(0C)
Refractive index 1.46
Crystal structure Hexagonal
Magnetic susceptibility -111×10-6cm3/mol
Appearance White crystalline solid
Solubility Soluble in  alcohol, ether and ammonia.

Chemical Properties

Magnesium iodide is the odourless chemical substances. it is hexagonal in the structure. The melting point is low and it decomposed in the boiling point. It looks like a white crystalline solid in the appearance. It is soluble in alcohol, ether and ammonia.


It is commonly used in the preparing the chemical compounds for organic synthesis. Medicinally it is diagnosed for many treatments and diseases.


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