Calcium bisulfite

Calcium bisulfite
Names
IUPAC name
Calcium hydrogen sulfite
Other names
  • Calcium bisulphite
  • E227
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.034.007
E number E227 (preservatives)
RTECS number
  • EV9294500
UNII
  • InChI=1S/Ca.2H2O3S/c;2*1-4(2)3/h;2*(H2,1,2,3)/q+2;;/p-2 Y
    Key: LVGQIQHJMRUCRM-UHFFFAOYSA-L Y
  • InChI=1/Ca.2H2O3S/c;2*1-4(2)3/h;2*(H2,1,2,3)/q+2;;/p-2
    Key: LVGQIQHJMRUCRM-NUQVWONBAX
  • OS(=O)[O-].OS(=O)[O-].[Ca+2]
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).
Y verify (what is YN ?)
Infobox references

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.

This article is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.