View source for Sodium bisulfite

{{Distinguish|sodium bisulfate}}
{{chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 477858271
| ImageFile = Sodium bisulfite.png
| ImageSize = 140px
| ImageFile1 = Sodium-bisulfite-3D-balls.png
| ImageSize1 = 160px
| ImageName1 = Ball-and-stick model of a bisulfite anion (left) and a sodium cation (right)
| IUPACName = Sodium hydrogen sulfite
| OtherNames = E222, sodium bisulphite
|Section1={{Chembox Identifiers
| CASNo = 7631-90-5
| CASNo_Ref = {{cascite|correct|CAS}}
| ChEBI_Ref = {{ebicite|correct|EBI}}
| ChEBI = 26709
| PubChem = 23665763
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 571016
| ChEMBL_Ref = {{ebicite|changed|EBI}}
| ChEMBL = 1689285
| SMILES = [Na+].[O-]S(=O)O
| InChI = 1/Na.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+1;/p-1
| InChIKey = DWAQJAXMDSEUJJ-REWHXWOFAL
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI = 1S/Na.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+1;/p-1
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = DWAQJAXMDSEUJJ-UHFFFAOYSA-M
| RTECS = VZ2000000
  }}
|Section2={{Chembox Properties
| Formula = NaHSO<sub>3</sub>
| MolarMass = 104.061{{nbsp}}g/mol
| Appearance = White solid
| Odor = Slight sulfurous odor
| Density = 1.48{{nbsp}}g/cm<sup>3</sup>
| MeltingPtC = 150
| BoilingPtC = 315 
| Solubility = 42{{nbsp}}g/100{{thinsp}}mL
| RefractIndex = 1.526
  }}
|Section7={{Chembox Hazards
| ExternalSDS = 
| EUClass = Harmful ('''Xn''')
| RPhrases = {{R22}} {{R31}}
| SPhrases = {{S2}}, {{S25}}, {{S46}}
| NFPA-H = 2
| NFPA-F = 0
| NFPA-R = 1
| FlashPt = Non-flammable
| LD50 = 
| IDLH = N.D.<ref name=PGCH/>
| PEL = none<ref name=PGCH>{{PGCH|0561}}</ref>
| REL = TWA 5{{nbsp}}mg/m<sup>3</sup><ref name=PGCH/> 
  }}
|Section8={{Chembox Related
| OtherAnions = [[Sodium sulfite]]<br/>[[Sodium metabisulfite]]
| OtherCations = [[Potassium bisulfite]]
  }}
}}

'''Sodium bisulfite''', also known as '''sodium hydrogen sulfate''', is a [[chemical]] compound. Its chemical formula is NaHSO<sub>3</sub>. It is made of [[sodium]] and [[bisulfite]] [[ion]]s. It is a white solid with an odor of [[sulfur dioxide]]. It can be made by reacting smaller amounts of [[sodium dioxide]] and [[sodium hydroxide]] or [[sodium bicarbonate]]. If too much sodium hydroxide is used, [[sodium disulfite]] is made instead.

==Related pages==
*[[Sulfite]]
*[[Sodium sulfite]]
*[[Sulfate]]

===References===
{{Reflist}}

{{chem-stub}}

[[Category:Sodium compounds]]
[[Category:Sulfur compounds]]