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Iodous acid

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Iodous acid
Ball-and-stick model of iodous acid
Ball-and-stick model of iodous acid
Space-filling model of iodous acid
Space-filling model of iodous acid
Names
IUPAC name iodous acid
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.032.004 Edit this at Wikidata
PubChem CID
CompTox Dashboard (EPA)
InChI
  • InChI=1S/HIO2/c2-1-3/h(H,2,3)
SMILES
  • O
Properties
Chemical formula HIO2
Molar mass 159.911
Conjugate base Iodite
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

Iodous acid is the chemical compound with the formula HIO2. Its salts are named iodites; these are exceedingly unstable and have been observed but never isolated. They will rapidly disproportionate to molecular iodine and iodates.

Other oxyacids

Iodous acid is part of a series of oxyacids in which iodine can assume oxidation states of −1, +1, +3, +5, or +7. A number of neutral iodine oxides are also known.

Iodine oxidation state −1 +1 +3 +5 +7
Name Hydrogen iodide Hypoiodous acid Iodous acid Iodic acid Periodic acid
Formula HI HIO HIO2 HIO3 HIO4 or H5IO6

References

  1. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
Hydrogen compounds
Iodine compounds
Iodine(−I)
Iodine(I)
Iodine(II)
Iodine(III)
Iodine(IV)
Iodine(V)
Iodine(VII)


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