Barium sulfite

Barium sulfite

Structure of barium sulfite
Names
IUPAC name Barium sulfite
Identifiers
CAS Number	7787-39-5  Y
3D model (JSmol)	Interactive image
ChemSpider	450991  Y
ECHA InfoCard	100.029.193
PubChem CID	6096951
UNII	D71W8VF49C  Y
CompTox Dashboard (EPA)	DTXSID00228489
InChI InChI=1S/Ba.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+2;/p-2 Y Key: ARSLNKYOPNUFFY-UHFFFAOYSA-L Y InChI=1/Ba.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+2;/p-2 Key: ARSLNKYOPNUFFY-NUQVWONBAA
SMILES [Ba+2].[O-]S([O-])=O
Properties
Chemical 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 otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y  verify  (what is  YN ?) Infobox references

Barium sulfite is the inorganic compound with the chemical formula BaSO₃. It is a white powder that finds few applications.

Occurrence

It is an intermediate in the carbothermal reduction of barium sulfate to barium sulfide: ^[2]

BaSO₄ + CO → BaSO₃ + CO₂

It also occurs as an intermediate phase in the aqueous oxidation of BaS to BaSO₄ by weathering in slag. ^[3]

Uses

Barium sulfite is used in the hydrolysis of dialdehyde starch by sulfurous acid yielding glyoxal and erythrose. ^[4] The barium sulfite complexes with the glyoxal, allowing for higher reagent concentrations without loss of yield. ^[4]

References

1. Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, Florida: CRC Press, pp. 4–45, ISBN   0-8493-0594-2
2. Kresse, Robert; Baudis, Ulrich; Jäger, Paul; Riechers, H. Hermann; Wagner, Heinz; Winkler, Jochen; Wolf, Hans Uwe (2007). "Barium and Barium Compounds". Ullmann's Encyclopedia of Industrial Chemistry . Weinheim: Wiley-VCH. doi:10.1002/14356007.a03_325.pub2. ISBN   978-3527306732.
3. Braithwaite, R. S. W.; Kampf, A. R.; Pritchard, R. G.; Lamb, R. P. H. (1993-06-01). "The occurrence of thiosulfates and other unstable sulfur species as natural weathering products of old smelting slags". Mineralogy and Petrology. 47 (2): 255–261. doi:10.1007/BF01161570. ISSN   1438-1168.
4. Wilham, C. A.; McGuire, T. A.; Cleve, J. W. Van; Otey, F. H.; Mehltretter, C. L. (2002-05-01). "Hydrolysis of Dialdehyde Starch. Glyoxal and Erythrose Production in Sulfurous Acid-Barium Sulfite Solutions". ACS Publications. doi:10.1021/i360001a014 . Retrieved 2026-01-24.