iodine monoxide

{{about|the compound IO|the oxoanion with the formula IO⁻|hypoiodite|the molecule I₂O|Diiodine monoxide}}

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| ImageFile = Iodine-monoxide-3D-vdW.png

| ImageSize = 150px

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| OtherNames = Iodine(II) oxide, iodosyl, oxidoiodine

|Section1={{Chembox Identifiers

| CASNo = 14696-98-1

| CASNo_Ref = {{cascite|correct|CAS}}

| ChemSpiderID = 4574060

| UNII_Ref = {{fdacite|changed|FDA}}

| DTXSID = 101316449

| UNII =

| ChEBI = 29896

| EINECS =

| Gmelin = 1170

| PubChem = 5460557

| StdInChI = 1S/IO/c1-2

| StdInChIKey = AFSVSXMRDKPOEW-UHFFFAOYSA-N

| SMILES = [O]I

}}

|Section2={{Chembox Properties

| I=1 | O=1

| Appearance = purple gas{{cn|date=March 2023}}

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|Section3={{Chembox Hazards

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|Section6={{Chembox Related

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Iodine monoxide is a binary inorganic compound of iodine and oxygen with the chemical formula IO•. A free radical, this compound is the simplest of many iodine oxides.{{cite journal |last1=Dix |first1=Barbara |last2=Baidar |first2=Sunil |last3=Bresch |first3=James F. |last4=Hall |first4=Samuel R. |last5=Schmidt |first5=K. Sebastian |last6=Wang |first6=Siyuan |last7=Volkamer |first7=Rainer |title=Detection of iodine monoxide in the tropical free troposphere |journal=Proceedings of the National Academy of Sciences |date=5 February 2013 |volume=110 |issue=6 |pages=2035–2040 |doi=10.1073/pnas.1212386110 |language=en |issn=0027-8424|doi-access=free |pmc=3568334 }}{{cite web |title=Iodine oxide |url=https://webbook.nist.gov/cgi/inchi/InChI%3D1S/IO/c1-2 |publisher=NIST |language=en}}{{cite book |last1=Haynes |first1=William M. |title=CRC Handbook of Chemistry and Physics, 96th Edition |date=9 June 2015 |publisher=CRC Press |isbn=978-1-4822-6097-7 |page=2-17 |url=https://books.google.com/books?id=RpLYCQAAQBAJ&dq=iodine+monoxide+IO&pg=SA2-PA17 |access-date=27 March 2023 |language=en}} It is similar to the oxygen monofluoride, chlorine monoxide and bromine monoxide radicals.