Calcium iodate

Calcium iodate

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Names
IUPAC name Calcium diiodate
Other names Lautarite
Identifiers
CAS Number	7789-80-2 (anhydrous) N 10031-33-1 (hexahydrate) N
ChemSpider	23021 Y
EC Number	232-191-3
Jmol 3D model	Interactive image
PubChem	24619
InChI InChI=1S/Ca.2HIO3/c;2*2-1(3)4/h;2*(H,2,3,4)/q+2;;/p-2 Y Key: UHWJJLGTKIWIJO-UHFFFAOYSA-L Y InChI=1/Ca.2HIO3/c;2*2-1(3)4/h;2*(H,2,3,4)/q+2;;/p-2 Key: UHWJJLGTKIWIJO-NUQVWONBAT
SMILES [Ca+2].[O-]I(=O)=O.[O-]I(=O)=O
Properties
Chemical formula	Ca(IO3)2
Molar mass	389.88 g/mol (anhydrous) 407.90 g/mol (monohydrate)
Appearance	white solid
Density	4.519 g/cm3 (monohydrate)
Melting point	540 °C (1,004 °F; 813 K) (monohydrate)
Boiling point	decomposes
Solubility in water	0.09 g/100 mL (0 °C) 0.24 g/100 mL (20 °C) 0.67 g/100 mL (90 °C)
Solubility	soluble in nitric acid insoluble in alcohol
Structure
Crystal structure	monoclinic (anhydrous) cubic (monohydrate) orthorhombic (hexahydrate)
Vapor pressure	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Calcium iodate are inorganic compound composed of calcium and iodate anion. Two forms are known, anhydrous Ca(IO₃)₂ and the monohydrate Ca(IO₃)₂(H₂O). Both are colourless salts that occur naturally as the minerals called lautarite and bruggenite, respectively. A third mineral form of calcium iodate is dietzeite, a salt containing chromate with the formula Ca₂(IO₃)₂CrO₄.

Production and reactions

Lautarite, described as the most important mineral source of iodine, is mined in the Atacama Desert. Processing of the ore entails reduction of its aqueous extracts with sodium bisulfite to give sodium iodide. Via a comproportionation reaction, the sodium iodide is combined with the iodate salt to produce elemental iodine. Calcium iodate can be produced by the anodic oxidation of calcium iodide or by passing chlorine into a hot solution of lime in which iodine has been dissolved.

Uses

Calcium iodate can also be used as an iodine supplement in chicken feed.

Calcium iodate is used in the manufacture of disinfectants, antiseptics, and deodorants.