Editing Nitrite (section)

{{Short description|Portmanteau name for nitrite derivatives}}
{{Distinguish|nitride|nitrate|nitrogen dioxide}}
{{Use dmy dates|date=February 2023}}
{{Chembox
| ImageFileL1 = Nitrit-Ion2.svg
| ImageClassL1   = skin-invert
| ImageAltL1 = A nitrogen atom is bonded to two oxygen atoms, with bond strength 1.5, in a bent geometry; the collective ion bears a single negative charge
| ImageFileR1 = Nitrite-3D-vdW.png
| ImageAltR1 = [[Space-filling model]] of the nitrite ion
| ImageClassR1 = bg-transparent
| SystematicName = dioxidonitrate(1−)
| IUPACName = Nitrite
| OtherNames = nitrite
|Section1={{Chembox Identifiers
| CASNo = 14797-65-0
| CASNo_Ref = {{cascite|correct|CAS}}
| UNII = J39976L608
| UNII_Ref = {{fdacite|correct|FDA}}
| EINECS = 233-272-6
| PubChem = 946
| ChemSpiderID = 921
| SMILES = N(=O)[O-]
| InChI = 1/HNO2/c2-1-3/h(H,2,3)/p-1
| InChIKey = IOVCWXUNBOPUCH-REWHXWOFAR
| StdInChI = 1S/HNO2/c2-1-3/h(H,2,3)/p-1
| StdInChIKey = IOVCWXUNBOPUCH-UHFFFAOYSA-M
| RTECS = 
| MeSHName = 
| ChEBI = 16301 }}
|Section2={{Chembox Properties
| Formula = {{chem|NO|2|-}}
| N=1 | O=2
| Appearance =
| Solubility = 
| ConjugateAcid = [[Nitrous acid]]}}
|Section3={{Chembox Hazards
| MainHazards =
| FlashPt =
| AutoignitionPt = }}
}}

The '''nitrite''' [[polyatomic ion|ion]] has the [[chemical formula]] {{chem|NO|2|−}}. Nitrite (mostly [[sodium nitrite]]) is widely used throughout chemical and pharmaceutical industries.<ref name=Ullmann>{{Ullmann| first1 = Wolfgang | last1 = Laue | first2 = Michael | last2 = Thiemann | first3 = Erich | last3 = Scheibler | first4 = Karl Wilhelm | last4 = Wiegand | name-list-style = vanc | title= Nitrates and Nitrites |year = 2006 | doi = 10.1002/14356007.a17_265 | isbn = 978-3527306732 }}</ref> The nitrite anion is a pervasive intermediate in the [[nitrogen cycle]] in nature. The name nitrite also refers to organic compounds having the –ONO group, which are esters of [[nitrous acid]].