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Calcium bisulfite
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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 bisulfite is an acid salt and behaves like an acid in aqueous solution.
==See also==
* Pulp (paper)
* Potassium bisulfite
* Sodium bisulfite
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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