Calcium iodate

Chemical properties

solid

The Uses of Calcium iodate

Calcium Iodate is a source of iodine that is a white powder of slight solubility in water, but greater solubility in water containing iodides or amino acids. it is more stable than the iodide form. it is used as a dough conditioner in bread and is a source of iodine in table salts.

The Uses of Calcium iodate

Calcium iodate (also called Lautarite) is used as an oxidant added to lotions and ointments as an antiseptic and deodorant. It is also used in the food industry in animal feed, and the manufacture of disinfectants.The forms of iodine most commonly used in animal feed are calcium iodate, ethylenediamine dihydriodide (EDDI), and potassium iodide. Calcium iodate is usually the most stable source of iodine. All three major sources of iodine (calcium iodate, EDDI, and potassium iodide) are roughly equivalent in biological availability.

Preparation

This composition occurs as a mineral “Lautarite (Calcium Iodate·Monohydrate). It can be prepared by the reaction of iodic acid upon the carbonate:
CaCO3 ＋2HIO3→Ca(IO3)2 ＋CO2＋H2O
The monohydrate formed has limited solubility in water and can be separated by filtration.The slurry can be evaporated to increase the yield.

Flammability and Explosibility

Non flammable

Safety Profile

A nuisance dust.

Purification Methods

Crystallise it from water (100mL/g at 100o and 100mL/0.1g at 0o). [Bahl & Singh J Indian Chem Soc 17 397 1940.]