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	516931
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. It is an intermediate in the carbothermal reduction of barium sulfate to barium sulfide:^[2]

BaSO₄ + CO → BaSO₃ + CO₂

References

^ Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, Florida: CRC Press, pp. 4–45, ISBN 0-8493-0594-2
^ Kresse, Robert; Baudis, Ulrich; Jäger, Paul; Riechers, H. Hermann; Wagner, Heinz; Winkler, Jochen; Wolf, Hans Uwe (2007). "Ullmann's Encyclopedia of Industrial Chemistry". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a03_325.pub2. ISBN 978-3527306732.