Iodite
anion derived from an iodous acid

The iodite ion, or iodine dioxide anion, is the halite with the chemical formula IO−2. Within the ion, the iodine exists in the oxidation state of +3.
Iodite anion
Iodites (including iodous acid) are highly unstable and have been observed but never isolated. They will rapidly disproportionate to molecular iodine and iodates. However, they have been detected as intermediates in the conversion between iodide and iodate.
Other oxyanions
Iodine can assume oxidation states of −1, +1, +3, +5, or +7. A number of neutral iodine oxides are also known.
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This entry incorporates text from “Iodite” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.