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{{One source|date=November 2023}}
{{chembox
| Verifiedfields = changed
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| verifiedrevid =
| ImageFile = Calcium iodate.png
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| IUPACName = Calcium diiodate
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| InChIKey = UHWJJLGTKIWIJO-NUQVWONBAT
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
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| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = UHWJJLGTKIWIJO-UHFFFAOYSA-L
| CASNo_Ref = {{cascite|correct|
| CASNo = 7789-80-2
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| CASNo2_Ref = {{cascite|changed|??}}
| EC-number = 232-191-3▼
| CASNo2 = 10031-33-1
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}▼
| CASNo2_Comment = (hexahydrate)
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = L8MN4Y57BR
| UNII_Comment = (anhydrous)
| ChemSpiderID = 23021
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▲| Appearance = white solid
| MeltingPtC = 540
▲| Density = 4.519 g/cm<sup>3</sup> (monohydrate)
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| SolubilityProduct = 6.47{{e|-6}}
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| MagSus = -101.4·10<sup>−6</sup> cm<sup>3</sup>/mol }}
|Section3={{Chembox Structure
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▲| CrystalStruct = monoclinic (anhydrous) <br> cubic (monohydrate) <br> orthorhombic (hexahydrate)
▲| FlashPt = non-flammable
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'''Calcium iodate''' is any of two [[inorganic compound]]s with the formula Ca(IO<sub>3</sub>)<sub>2</sub>(H<sub>2</sub>O)<sub>x</sub>, where x = 0 or 1. Both are colourless salts that occur as the minerals [[lautarite]] and [[bruggenite]], respectively. A third mineral form of calcium iodate is [[dietzeite]], a salt containing [[Monochromate|chromate]] with the formula Ca<sub>2</sub>(IO<sub>3</sub>)<sub>2</sub>CrO<sub>4</sub>.<ref name=Ullmann>{{Ullmann |doi=10.1002/14356007.a14_381.pub2 |title=Iodine and Iodine Compounds |year=2015 |last1=Lyday |first1=Phyllis A. |last2=Kaiho |first2=Tatsuo |pages=1–13 }}</ref> These minerals are the most common compounds containing [[iodate]].
==Production and uses==
Lautarite, described as ''the'' most important mineral source of iodine, is mined in the [[Atacama Desert]].<ref name=Ullmann/> Processing of the ore entails reduction of its aqueous extracts with [[sodium bisulfite]] to give [[sodium iodide]]. This [[Comproportionation|comproportionation reaction]] is a major source of the sodium iodide.<ref name=Ullmann/>
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.
Calcium iodate is used as an iodine supplement in [[chicken feed]].<ref name=Ullmann/> [[Ethylenediamine dihydroiodide]] (EDDI) is a more typical source of nutritional [[iodine]].
==References==
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{{Calcium compounds}}
{{Iodates}}
[[Category:Antiseptics]]
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[[Category:Iodates]]
[[Category:Oxidizing agents]]
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