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Magnesium sulfite

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Magnesium sulfite is a chemical compound containing magnesium and sulfite, 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.

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
Properties
MgSO
3 (anhydrous); MgSO
3·6H
2O
Molar mass 104.368200 g/mol; 212.4599 g/mol (with water)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

References

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

See also

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