Calcium iodateis an inorganic compound composed of calcium dication and iodate anion. It is a colourless salt that occurs naturally as the mineral called lautarite, which is found in the Atacama Desert in Chile.[1]
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| Names | |
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| IUPAC name
Calcium diiodate
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| Other names
Lautarite
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| Identifiers | |
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3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.029.265 |
| E number | E916 (glazing agents, ...) |
PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| 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 |
| 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 | |
| monoclinic (anhydrous) cubic (monohydrate) orthorhombic (hexahydrate) | |
| Hazards | |
| Flash point | non-flammable |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Production and reactions
It can also be formed by the anodic oxidation of calcium iodide or by passing chlorine into a hot solution of lime in which iodine has been dissolved.
Uses
The mineral a commercially useful precursor to iodine. 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.[1]
Calcium iodate can also be used as an iodine supplement in chicken feed.[1]
Calcium iodate is also added to lotions and ointments as an antiseptic and deodorant.[2]
References
- ^ a b c Lyday, Phyllis A. "Iodine and Iodine Compounds" in Ullmann's Encyclopedia of Industrial Chemistry, 2005, Wiley-VCH, Weinheim, ISBN 978-3-527-30673-2 doi:10.1002/14356007.a14_381 Vol. A14 pp. 382–390.
- ^ Calcium iodate from the Online Medical Dictionary
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