Calcium sulfite
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| Calcium sulfite | |
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| IUPAC name | Calcium sulfurous acid |
| Other names | Calcium sulphite E226 |
| Identifiers | |
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| PubChem | |
| SMILES | OS(=O)O.[Ca+2] |
| Properties | |
| Molecular formula | CaSO3 |
| Molar mass | 120.17 g/mol |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Calcium sulfite (calcium sulphite) is a chemical compound which is the salt of calcium cation and sulfite anion. As a food additive it is used as a preservative under the E number E226. It is commonly used in preserving wine, cider, fruit juice, canned fruit and vegetables.
Like other metal sulfites, calcium sulfite reacts with acids to produce the respective salt, sulfur dioxide gas and water.
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