Calcium bisulfite
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Calcium bisulfite (calcium bisulphite or calcium hydrogen sulfite) is an inorganic compound which is the salt of a calcium cation and a bisulfite anion. It may be prepared by treating lime with an excess of sulfur dioxide and water. As a food additive it is used as a preservative under the E number E227. Calcium bisulfite is an acid salt and behaves like an acid in aqueous solution. It is used in the sulfite process for producing paper from wood chips.[1]
Quick Facts Names, Identifiers ...
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IUPAC name
Calcium hydrogen sulfite | |
Other names
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Identifiers | |
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ECHA InfoCard | 100.034.007 |
E number | E227 (preservatives) |
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RTECS number |
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CompTox Dashboard (EPA) |
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Properties | |
Ca(HSO3)2 | |
Molar mass | 202.22 g/mol |
Melting point | 203 °C |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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