Aluminium Iodide, Formula, Chemical Properties, Preparation, Uses

Aluminium Iodide

Aluminium iodide is a chemical compound that has the composition of aluminium and iodine. Aluminium iodide is one of the strong lewis acid and it acts as a absorbent in the atmosphere. The hexahydrate is another form of the aluminium iodide that is obtained by the reaction of metallic aluminium or aluminium hydroxide with hydrogen iodide or hydroiodic acid. The systematic IUPAC name is known as aluminium iodide. The chemical or molecular formula of aluminium iodide is AlI3. The other name is aluminium triiodide.

Structural Formula

This is the structural formula of the aluminium iodide:

Aluminium Iodide

Chemical Formula

The chemical formula of the aluminium iodide is AlI3.

Preparation Method

The aluminium iodide is prepared by the triiodide is heated at the unstable temperature that gives the formation of aluminium iodide and diiodide as the byproduct. It is mainly used in the particular reagent for the certain kinds of bonds such as C-O and N-O bonds. When it deoxygenates epoxides and it cleaves the aryl ethers.

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3 AlI → AlI3 + 2 Al

Physical Properties

Melting point 188.28C
Boiling point 382C
Molecular weight 407.695g/mol
Density 3.98g/cm3
Solubility in water Soluble
Crystal structure Monoclinic
Appearance White or yellow powder

Chemical Properties

Aluminium iodide is bitter in taste. It looks like a white or yellow powder in the appearance. The forms of monomeric and dimeric is characterized at the gas phase. The melting and boiling point has been very low. It has a low density. It is partially soluble in hydrolysis.


Aluminium iodide is a catalyst used in certain organic reactions. It is also used in aerosol when treating animal stalls. It is used for animals for treatment. Aluminium iodide is used in organic compounds to make the chemicals. It is used as an additive for electrolytes in the lithium-ion batteries.


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