Hypoiodous acid

Hypoiodous acid
Names
	IUPAC name Hypoiodous acid
	Other names Hypoiodous acid
Identifiers
CAS Number	14332-21-9 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:29231 ;
ChemSpider	109942 ;
PubChem CID	123340;
CompTox Dashboard (EPA)	DTXSID8042050 ;
	InChI InChI=1S/HIO/c1-2/h2H Key: GEOVEUCEIQCBKH-UHFFFAOYSA-N ;
	SMILES HIO;
Properties
Chemical formula	HIO
Molar mass	143.89 g/mol
Appearance	?
Density	?
Melting point	?
Boiling point	?
Solubility in water	?
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Hypoiodous acid is the inorganic compound with the chemical formula HIO. It forms when an aqueous solution of iodine is treated with mercuric or silver salts. It rapidly decomposes by disproportionation:^[1]

5 HIO → HIO₃ + 2I₂ + 2H₂O

Hypoiodous acid is a weak acid with a K_a of about 10⁻¹¹. The conjugate base is hypoiodite (OI^-). Salts of this anion can be prepared by treating I₂ with alkali hydroxides. They rapidly disproportionate to form iodides and iodates.^[1]

References

^ ^a ^b Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier ISBN 0-12-352651-5

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[Wiberg&Holleman-1] Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier ISBN 0-12-352651-5

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