What is 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 [[