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CAS 16731-55-8

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Potassium pyrosulfite

Description:
Potassium pyrosulfite, also known as potassium metabisulfite, is an inorganic compound with the formula K2S2O5. It appears as a white crystalline powder and is highly soluble in water, where it dissociates to release sulfite ions. This compound is commonly used as a preservative and antioxidant in food and beverages, particularly in winemaking, due to its ability to inhibit microbial growth and oxidation. In addition to its food applications, potassium pyrosulfite is utilized in various industrial processes, including photography and water treatment, where it acts as a reducing agent. It has a relatively low toxicity, but exposure can cause irritation to the respiratory system and skin. The compound is stable under normal conditions but should be stored in a cool, dry place away from strong acids and oxidizing agents to prevent decomposition. Overall, potassium pyrosulfite is valued for its versatility and effectiveness in both food preservation and industrial applications.
Formula:H2O5S2·2K
InChI:InChI=1S/2K.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)
InChI key:InChIKey=TWDUAWOEUFKDNM-UHFFFAOYSA-N
SMILES:S(S(=O)O)(=O)(=O)O.[K]
Synonyms:
  • Bisulfite de dipotassium
  • Dikaliumdisulfit
  • Dipotassium Disulphite
  • Dipotassium disulfite
  • Dipotassium metabisulfite
  • Dipotassium pyrosulfite
  • Disulfite De Dipotassium
  • Disulfito De Dipotasio
  • Disulfurous acid, potassium salt (1:2)
  • E 224
  • See more synonyms
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