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Calcium bisulfite

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Title: Calcium bisulfite  
Author: World Heritage Encyclopedia
Language: English
Subject: Pulp (paper), Food additives, Calcium monophosphide, Calcium sulfite, Sodium bisulfite
Collection: Bisulfites, Calcium Compounds, Food Additives
Publisher: World Heritage Encyclopedia

Calcium bisulfite

Calcium bisulfite
IUPAC name
Calcium hydrogen sulfite
Other names
Calcium bisulphite
ChemSpider  YesY
Jmol-3D images Image
RTECS number EV9294500
Molar mass 202.22 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
 YesY  (: YesY/N?)

Calcium bisulfite (calcium bisulphite) is an 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 its aqueous solution.

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