The other names for this compound are potassium acid sulfite and potassium hydrogen sulfite


  • It is a white, granulated, shiny powder that smells like sulfur dioxide.


  • It is less poisonous in nature.


  • It is soluble in water but not in alcohol.


  • It is obtained by the mutual reaction of sulfur dioxide and sodium carbonate. This process is done by passing sulfur dioxide from the solution of sodium carbonate. After that, the solution becomes concentrated and converted into granules.


  • Commercial, regent and pharmaceutical.


  • It used as reducing agent for many organic compounds
  • It is also used as an Antiseptic, in bleaching of textile fiber, as a preservative and in the preparation of vitamin B.

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