Calcium bisulfite

Calcium bisulfite
Names
	IUPAC name Calcium hydrogen sulfite
	Other names Calcium bisulphite; E227
Identifiers
CAS Number	13780-03-5 ;
3D model (JSmol)	Interactive image;
ChemSpider	24475 ;
ECHA InfoCard	100.034.007
E number	E227 (preservatives)
PubChem CID	26268;
RTECS number	EV9294500
	InChI InChI=1S/Ca.2H2O3S/c;21-4(2)3/h;2(H2,1,2,3)/q+2;;/p-2 Key: LVGQIQHJMRUCRM-UHFFFAOYSA-L ; InChI=1/Ca.2H2O3S/c;21-4(2)3/h;2(H2,1,2,3)/q+2;;/p-2 Key: LVGQIQHJMRUCRM-NUQVWONBAX;
	SMILES OS(=O)[O-].OS(=O)[O-].[Ca+2];
Properties
Chemical formula	Ca(HSO3)2
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).
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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 bisulfite is an acid salt and behaves like an acid in aqueous solution.

Names


IUPAC name Calcium hydrogen sulfite
Other names Calcium bisulphite E227
Identifiers
CAS Number	13780-03-5^Y
3D model (JSmol)	Interactive image
ChemSpider	24475^Y
ECHA InfoCard	100.034.007
E number	E227 (preservatives)
PubChem CID	26268
RTECS number	EV9294500
InChI InChI=1S/Ca.2H2O3S/c;21-4(2)3/h;2(H2,1,2,3)/q+2;;/p-2^Y Key: LVGQIQHJMRUCRM-UHFFFAOYSA-L^Y InChI=1/Ca.2H2O3S/c;21-4(2)3/h;2(H2,1,2,3)/q+2;;/p-2 Key: LVGQIQHJMRUCRM-NUQVWONBAX
SMILES OS(=O)[O-].OS(=O)[O-].[Ca+2]
Properties
Chemical formula	Ca(HSO₃)₂
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).
Y verify (what is ^YN ?)
Infobox references

Calcium bisulfite

See also