Calcium iodate

From Wikipedia, the free encyclopedia
  (Redirected from E916)
Jump to: navigation, search
Calcium iodate
Calcium iodate.png
IUPAC name
Calcium diiodate
Other names
7789-80-2 (anhydrous) N
10031-33-1 (hexahydrate) N
ChemSpider 23021 YesY
EC number 232-191-3
Jmol-3D images Image
PubChem 24619
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
monoclinic (anhydrous)
cubic (monohydrate)
orthorhombic (hexahydrate)
Flash point non-flammable
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
 N verify (what isYesY/N?)
Infobox references

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]

Production and reactions[edit]

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.


The mineral is 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]


  1. ^ 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.
  2. ^ Calcium iodate from the Online Medical Dictionary