Potassium sulfite explained

Potassium sulfite is the inorganic compound with the formula K2SO3. It is the salt of potassium cation and sulfite anion. It is a white solid that is highly soluble in water. Potassium sulfite is used for preserving food and beverages.[1]

Production and reactions

See also: Wellman–Lord process. Potassium sulfite is produced by the thermal decomposition of potassium metabisulfite at 190 °C:[2]

Structure

The structure of solid, as assessed by X-ray crystallography. The S-O distances are 1.515 Å, and the O-S-O angles are 105.2°[3]

Notes and References

  1. Web site: Potassium sulfite (225) . Codex Alimentarius . Food and Agriculture Organization of the United Nations .
  2. Book: 10.1002/9780470132333.ch49. 9780470132333. Sulfites and Pyrosulfites of the Alkali Metals. 1946. Johnstone. H. F.. Inorganic Syntheses . 162–167. 2.
  3. 10.3891/acta.chem.scand.40a-0479 . The Structure of Potassium Sulfite . 1986 . Andersen . Leif . Strömberg . Dan . Nevala . H. . Pohjola . S. . Niinistö . Lauri . Volden . Hans V. . Weidlein . Johann . Zingaro . Ralph A. . Acta Chemica Scandinavica . 40a . 479–480 . free .

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