| Calcium bisulfite | |
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Calcium hydrogen sulfite |
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Other names
Calcium bisulphite |
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| Identifiers | |
| CAS number | 13780-03-5 |
| PubChem | 26268 |
| RTECS number | EV9294500 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | Ca(HSO3)2 |
| Molar mass | 202.22 g/mol |
| (verify) (what is: /?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Calcium bisulfite (calcium bisulphite) is an inorganic compound which is the salt of a calcium cation and a bisulfite anion. It may be prepared by reacting lime with an excess of sulfurous acid, essentially a mixture of sulfur dioxide and water. It is a weak reducing agent, as is sulfur dioxide, sulfites, and any other compound containing sulfur in the +4 oxidation state. As a food additive it is used as a preservative under the E number E227.Calcium bisuphite is an acid salt and behaves like an acid in in its aqueous solution.
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