Calcium Iodide, Formula, Chemical Properties, Preparation, Uses

Calcium Iodide

Calcium iodide is the ionic compound which it crystallizes in cubes and it is easily soluble in water. With the use of moisture air decomposes and turns  the yellow colour with the liberation of iodine. It is also soluble in ethanol. It is the combination of the calcium and iodine. It appears a white crystals and used as source of salt for cat food.  The systematic IUPAC name is known as calcium iodide. The chemical or molecular name of calcium iodide is CaI2.

Structural Formula

This is the structural formula of the calcium iodide:

Calcium Iodide

Chemical Formula

The chemical formula of the calcium iodide is CaI2. It has consists of calcium ions and iodide ions compounds.

How it can Be Prepared

The calcium iodide can be prepared by reacting calcium carbonate with the hydroxidic acid or hydrogen iodide gas. It can be easily soluble in the water. this salt has a highly deliquescent solid in the appearance. When it is slowly reacts with the oxygen or carbon dioxide it could be liberated the iodine which is faint yellow colour. The chemical reaction is given as follows.

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CaCO3 + 2 HI → CaI2 + H2O + CO2

Physical Properties

Melting point 779C
Boiling point 1100C
Molecular weight 293.887g/mol
Density 3.956g/cm3
Solubility in water 64.6g/100mL
Refractive index 1.49
Crystal structure Rhombohedral
Magnetic susceptibility -109.0×10-6cm3/mol
Appearance White solid
Solubility Soluble in acetones and alcohols

Chemical Properties

Calcium iodide is a white solid or crystals. It is a strongly base chemical compounds. But it reacts with the both acid and basic forms. It has low density and high molecular weight. There is low melting point and high boiling point. It has bitter in taste.


Calcium iodide is mainly used for medicines and also a photography. calcium iodide is used as a iodine source of cat food. It increases the strong of tooth enamel at the time of filling it.


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