Iodite

Iodous acid
Ball-and-stick model of iodous acid	Space-filling model of iodous acid
Names
	IUPAC name iodous acid
Identifiers
CAS Number	12134-99-5;
3D model ( JSmol)	Interactive image;
ChemSpider	145806;
PubChem CID	166623;
	InChI InChI=1S/HIO2/c2-1-3/h(H,2,3);
	SMILES O[I+][O-];
Properties
Chemical formula	HIO2
Molar mass	159.91 g/mol
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

Iodite
Names
	IUPAC name iodite
	Systematic IUPAC name dioxidoiodate(1−)
Identifiers
CAS Number	20499-55-2;
3D model ( JSmol)	Interactive image;
ChemSpider	4574132;
PubChem CID	5460637;
	InChI InChI=1S/HIO2/c2-1-3/h(H,2,3)/p-1;
	SMILES [O-][I+][O-];
Properties
Chemical formula	IO−; 2
Molar mass	58.90 g/mol
Conjugate acid	Iodous acid
Related compounds
Other anions	Bromite
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

The iodite

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^[1] but never isolated.^{[citation needed]} They will rapidly disproportionate to molecular Iodine and Iodates.^[2] However, they have been detected as intermediates in the conversion between iodide and iodate.^[3]^[4]