Magnesium sulfite
Names
IUPAC name
Magnesium sulfite
Other names
Magnesium sulphite
Identifiers
ChemSpider
ECHA InfoCard 100.028.932 Edit this at Wikidata
EC Number
  • 231-825-6
UNII
Properties
MgSO
3 (anhydrous); MgSO
3·6H
2O
Molar mass 104.368200 g/mol (anhydrous)
212.4599 g/mol (hexahydrate)
5.2g/L at 298.2K (hexahydrate)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Magnesium sulfite is the magnesium salt of sulfurous acid with the formula MgSO
3. Its most common hydrated form has 6 water molecules making it a hexahydrate, MgSO
3·6H
2O. When heated above 40 °C (104 °F), it is dehydrated to magnesium sulfite trihydrate, or MgSO
3·3H
2O.[1] The anhydrous form is hygroscopic, meaning that it readily absorbs water from the air.

See also

References

  1. ^ Nývlt, J., "Solubilities of Magnesium Sulfite," Journal of Thermal Analysis and Calorimetry, Volume 66, Number 2 / November, 2001

solubility tables of MgSO3 hydrates PDF[1]

  1. ^ [1], H.D.Lutz, Dept. of Chemistry, University of Slegen.
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