Calcium sulfite
From Sciencemadness Wiki
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| Names | |
|---|---|
| IUPAC name
Calcium sulfite
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| Identifiers | |
10257-55-3 (anhydrous)  72878-03-6 (tetrahydrate) 29501-28-8 (hemihydrate) | |
| ChemSpider | 8329549
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| EC number | 233-596-8 |
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| Jmol-3D images | Image |
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| UNII | 7078964UQP 
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| Properties | |
| CaSO3 | |
| Molar mass | 120.17g/mol |
| Appearance | White solid |
| Melting point | 600 °C (1,112 °F; 873 K) |
| 4.3mg/100mL (18°C) | |
| Hazards | |
| Flash point | Non-flammable |
| Related compounds | |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| verify (what is: /?)
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| Infobox references | |
Calcium sulfite, or calcium sulphite, is a chemical compound, the calcium salt of sulfite with the formula CaSO3·x(H2O). Two crystalline forms are known, the hemihydrate and the tetrahydrate, respectively CaSO3·½(H2O) and CaSO3·4(H2O). All forms are white solids.
Production
It can be produced at laboratory scale by adding Calcium chloride into a solution of Sodium metabisulfite, forming quickly as a precipitate.
Uses
- Synthesizing sodium nitrite and potassium nitrite from their respective nitrates.
Structure
Structure of the [Ca3(SO3)2(H2O)12]2+ cage in calcium sulfite tetrahydrate.
Structure of anhydrous CaSO3.
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Natural occurrence
Calcium sulfite(III) hemihydrate occurs in the nature as the rare mineral hannebachite.[2][3]
See also
References
- ↑ John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99 ed.). CRC Press. pp. 5–188. ISBN 978-1138561632.
- ↑ "Hannebachite".
- ↑ "List of Minerals". 21 March 2011.
