Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chemical compound
Potassium bisulfite (or potassium hydrogen sulfite) is a chemical mixture with the approximate chemical formula KHSO3. Potassium bisulfite in fact is not a real compound,[1] 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 sulfur dioxide. Attempts to crystallize potassium bisulfite yield potassium metabisulfite, K2S2O5.[2]
Potassium bisulfite is used as a sterilising agent in the production of alcoholic beverages.[3] This additive is classified as E number E228 under the current EU-approved food additive legislation.[4]
^Tudela, David; Jenkins, H. Donald B. (2003). "New Methods to Estimate Lattice Energies: Application to the Relative Stabilities of Bisulfite (HSO3−) and Metabisulfite (S2O52-) Salts". Journal of Chemical Education. 80 (12): 1482. Bibcode:2003JChEd..80.1482T. doi:10.1021/ed080p1482.
^Johnstone, H. F. (1946). "Sulfites and Pyrosulfites of the Alkali Metals". Inorganic Syntheses. Inorganic Syntheses. Vol. 2. pp. 162–167. doi:10.1002/9780470132333.ch49. ISBN 9780470132333.
^Barberá, José Jiménez; Metzger, Adolf; Wolf, Manfred (2000). "Sulfites, Thiosulfates, and Dithionitesl Chemistry". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a25_477. ISBN 978-3527306732.
^"Approved additives and E numbers". Food Standards Agency. Retrieved 2020-04-07.
and 27 Related for: Potassium bisulfite information
Potassiumbisulfite (or potassium hydrogen sulfite) is a chemical mixture with the approximate chemical formula KHSO3. Potassiumbisulfite in fact is not...
Sodium bisulfite (or sodium bisulphite, sodium hydrogen sulfite) is a chemical mixture with the approximate chemical formula NaHSO3. Sodium bisulfite in fact...
and potassium salts of bisulfite cannot be obtained. However, there are some reports of anhydrous bisulfites with large counter ions. Bisulfite is a...
sulfite, but a closely related chemical oxide Potassiumbisulfite or potassium metabisulfite Sodium bisulfite, sodium metabisulfite or sodium sulfite Sulfites...
sodium bisulfite (E 222), sodium metabisulfite (E 223), potassium metabisulfite (E 224), calcium sulfite (E 226), calcium bisulfite (E 227) and potassium bisulfite...
widely used source of bisulfite, which predominates below pH 7 potassiumbisulfite, KHSO3: ill-defined, widely used source of bisulfite, which predominates...
Potassium sulfate (US) or potassium sulphate (UK), also called sulphate of potash (SOP), arcanite, or archaically potash of sulfur, is the inorganic compound...
silvering of mirrors. Potassium bromate (KBrO3) is a strong oxidizer (E924), used to improve dough strength and rise height. Potassiumbisulfite (KHSO3) is used...
Potassium metabisulfite, K2S2O5, also known as potassium pyrosulfite, is a white crystalline powder with a pungent odour. It is mainly used as an antioxidant...
material that has been bleached. Antichlors include sodium bisulfite, potassiumbisulfite, sodium metabisulfite, sodium thiosulfate, and hydrogen peroxide...
of iodate ion (for instance potassium iodate) to which an acidified solution (again with sulfuric acid) of sodium bisulfite is added. In this protocol...
antioxidant 227 E U calcium bisulfite, calcium hydrogen sulfite preservative, antioxidant 228 A E U potassiumbisulfite, potassium hydrogen sulfite preservative...
mineral salt Potassiumbisulfite – preservative, antioxidant Potassium bromate – flour treatment agent Potassium carbonate – mineral salt Potassium chloride...
respectively. Upon dissolution in water, bisulfite is generated: Na2S2O5 + H2O → 2 Na+ + 2 HSO3− Sodium and potassium metabisulfite have many major and niche...
elasticity, reduced proofing time, and improved machinability. Cysteine and bisulfite are reducing agents which relax wheat dough. Adding minute amounts of...
and bisulfite ions. These chemicals cleave the bonds between the cellulose and lignin components of the lignocellulose. A variety of sulfite/bisulfite salts...
bromocresol purple is used. Low-odor stop baths use citric acid or sodium bisulfite in place of acetic acid.[citation needed] Sowerby, A.L.M., ed. (1961)...
employed. Aldehydes characteristically form "addition compounds" with bisulfites: RCHO + HSO−3 → RCH(OH)SO−3 This reaction is used as a test for aldehydes...
+ H2O Although the equilibrium lies far to the left, evaporation of a bisulfite salt will produce a substantial amount of disulfite. Disulfite is the...
oxidation by air. Sodium bisulfite, NaHSO3, is mixture of salts that dissolve in water to give solutions composed of sodium and bisulfite ions. According to...
sulfosuccinate can be obtained by treating dioctyl maleate with sodium bisulfite. The bisulfite anion adds to the double bond: −CH=CH− + HSO−3 → −CH(−SO−3)−CH2−...
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