Magnesium sulfite
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Names | |||
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IUPAC name Magnesium sulfite | |||
Other names Magnesium sulphite | |||
Identifiers | |||
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ECHA InfoCard | 100.028.932 ![]() | ||
EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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Properties | |||
Chemical formula | MgSO 3 (anhydrous); MgSO 3·6H 2O | ||
Molar mass | 104.368200 g/mol (anhydrous) 212.4599 g/mol (hexahydrate) | ||
Solubility in water | 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). Infobox references |
Chemical compound
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.
Solubility tables of MgSO3 hydrates PDF: [2]
See also
- Calcium sulfite
- Magnesium sulfate (Epsom salt)
References
- v
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Magnesium compounds