Barium sulfite

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Barium sulfite
CAS number 7787-39-5 YesY=
PubChem 516931
ChemSpider 450991 YesY
Jmol-3D images Image 1
Molecular formula BaSO3
Molar mass 217.391 g/mol
Appearance white monoclinic crystals
Density 4.44 g/cm3
Melting point decomposes
Solubility in water 0.0011 g/100 mL
Solubility insoluble in ethanol[1]
Related compounds
Other anions Barium sulfate
Barium fluoride
Barium chloride
Barium bromide
Barium iodide
Other cations Calcium sulfite
Magnesium sulfite
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Barium sulfite is the barium salt of sulfurous acid with the chemical formula BaSO3. It is a white powder which is used in paper manufacturing. Like other barium compounds, it is toxic.[2]

It may be formed by the action of sulfur dioxide on barium oxide or barium hydroxide. It can also be formed by treating barium with sulfurous acid.


  1. ^ Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, FL: CRC Press, pp. 4–45, ISBN 0-8493-0594-2 
  2. ^ barium sulfite. McGraw-Hill Dictionary of Scientific and Technical Terms, McGraw-Hill Companies, Inc., 2003., accessed July 19, 2009.