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Latest revision as of 17:46, 11 September 2024 edit undoCitation bot (talk | contribs)Bots5,391,758 edits Removed parameters. | Use this bot. Report bugs. | Suggested by Abductive | Category:E-number additives | #UCB_Category 282/313 |
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| ImageFile = potassium bisulfite.png |
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| ImageSize =120px |
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| verifiedrevid = 325410066 |
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| IUPACName = Potassium hydrogen sulfite |
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| Name = |
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| OtherNames = Potassium bisulfite, potassium bisulphite solution, sulfurous acid, monopotassium salt, monopotassium sulfite |
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| ImageFile = Potassium bisulfite.svg |
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| Section1 = {{Chembox Identifiers |
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| ImageFile1 = Potassium-bisulfite-3D-balls.png |
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| IUPACName = Potassium hydrogen sulfite |
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| OtherNames = {{Unbulleted list|Potassium bisulfite|potassium bisulphite|monopotassium salt|monopotassium sulfite|potassium hydrosulfite}} |
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| SystematicName = |
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| Section1 = {{Chembox Identifiers |
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| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}} |
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| ChemSpiderID = 22889 |
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| CASNo_Ref = {{cascite|correct|??}} |
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| CASNo = 7773-03-7 |
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| CASNo = 7773-03-7 |
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| UNII_Ref = {{fdacite|changed|FDA}} |
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| PubChem = |
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| UNII = QJK5LO891P |
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| PubChem = 23663620 |
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| EINECS = 231-870-1 |
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| InChI = 1S/K.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+1;/p-1 |
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| SMILES = OS(=O). |
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| Formula = KHSO<sub>3</sub> |
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| Formula = KHSO<sub>3</sub> |
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| MolarMass = 120.1561 g/mol |
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| MolarMass = 120.1561 g/mol |
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| Appearance = White crystalline powder |
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| Appearance = White crystalline powder |
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| Odor = ]-like |
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| MeltingPtC = 190 |
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| MeltingPt_notes = (decomposes) |
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| Solubility = 49{{nbsp}}g/100{{thinsp}}mL (20{{nbsp}}°C) <br> 115{{nbsp}}g/100{{thinsp}}mL (100{{nbsp}}°C) |
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| Solubility = soluble |
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| SolubleOther = Insoluble in alcohol |
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'''Potassium bisulfite''' (or '''potassium hydrogen sulfite''') is a ] mixture with the approximately correctly mentioned formula ] KHSO<sub>3</sub>. Potassium bisulfite in fact is not a actual compound,<ref>{{cite journal|doi=10.1021/ed080p1482|bibcode=2003JChEd..80.1482T|title=New Methods to Estimate Lattice Energies: Application to the Relative Stabilities of Bisulfite (HSO<sub>3</sub><sup>−</sup>) and Metabisulfite (S<sub>2</sub>O<sub>5</sub><sup>2-</sup>) Salts|year=2003|last1=Tudela|first1=David|last2=Jenkins|first2=H. Donald B.|journal=Journal of Chemical Education|volume=80|issue=12|pages=1482}}</ref> but a mixture of salts that dissolve in water to give solutions composed of potassium ions and bisulfite ions. It is a white solid with an odor of ]. Attempts to crystallize potassium bisulfite yield ], K<sub>2</sub>S<sub>2</sub>O<sub>5</sub>.<ref>{{cite book|doi=10.1002/9780470132333.ch49|isbn=9780470132333|chapter=Sulfites and Pyrosulfites of the Alkali Metals|year=1946|last1=Johnstone|first1=H. F.|title=Inorganic Syntheses|pages=162–167|volume=2}}</ref> |
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'''Potassium hydrogen sulfite''' or '''potassium bisulfite''' is a ] with the ] KHSO<sub>3</sub>. It is used during the production of alcoholic beverages as a sterilising agent. This additive is classified as ] E228 under the current EU approved ].<ref></ref> |
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Potassium bisulfite is used as a sterilising agent in the production of alcoholic beverages.<ref>{{Ullmann|doi=10.1002/14356007.a25_477|isbn=3527306730|title=Sulfites, Thiosulfates, and Dithionitesl Chemistry|year=2000|last1=Barberá|first1=José Jiménez|last2=Metzger|first2=Adolf|last3=Wolf|first3=Manfred}}</ref> This additive is classified as ] E228 under the current EU-approved ] legislation.<ref>{{Cite web|url=http://www.food.gov.uk/business-guidance/approved-additives-and-e-numbers|title=Approved additives and E numbers|website=Food Standards Agency|language=en|access-date=2020-04-07}}</ref> |
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==Production== |
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It is made by the reaction of ] and ]. The sulfur dioxide is passed through a solution of the potassium carbonate until no more carbon dioxide is evolved. The solution is concentrated. |
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==See also== |
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==See also== |
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