Iodous acid
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| Names | |||
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| IUPAC name iodous acid | |||
| Identifiers | |||
CAS Number |
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3D model (JSmol) |
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| ChemSpider |
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| ECHA InfoCard | 100.032.004  | ||
PubChem CID |
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CompTox Dashboard (EPA) |
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InChI
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| 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 [77 °F], 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.[1] 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
- ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
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- H3AsO3
- H3AsO4
- HArF
- HAt
- HSO3F
- H[BF4]
- HBr
- HBrO
- HBrO2
- HBrO3
- HBrO4
- HCl
- HClO
- HClO2
- HClO3
- HClO4
- HCN
- HCNO
- H2CrO4/H2Cr2O7
- H2CO3
- H2CS3
- HF
- HFO
- HI
- HIO
- HIO2
- HIO3
- HIO4
- HMnO4
- H2MnO4
- H2MoO4
- HNC
- NaHCO3
- HNCO
- HNO
- HNO2
- HNO3
- H2N2O2
- HNO5S
- H3NSO3
- H2O
- H2O2
- H2O3
- H2O4
- H2O5
- H3PO2
- H3PO3
- H3PO4
- H4P2O7
- H5P3O10
- H2[PtCl6]
- H2S
- H2S2
- H2Se
- H2SeO3
- H2SeO4
- H4SiO4
- H2[SiF6]
- HSCN
- HNCS
- H2SO3
- H2SO4
- H2SO5
- H2S2O3
- H3O
- H2S2O6
- H2S2O7
- H2S2O8
- CF3SO3H
- H2Te
- H2TeO3
- H6TeO6
- H4TiO4
- H2Po
- H[Co(CO)4]
