Calcium bisulfite

Calcium bisulfite
IUPAC name	Calcium hydrogen sulfite
Other names	Calcium bisulphite E227
Identifiers
CAS number	[13780-03-5]
PubChem	26268
RTECS number	EV9294500
SMILES	OS(=O)[O-].OS(=O)[O-].[Ca+2]
Properties
Molecular formula	CaH2O6S2
Molar mass	202.22 g/mol
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references

Calcium bisulfite (calcium bisulphite) is an inorganic compound which is the salt of calcium cation and bisulfite anion. As a food additive it is used as a preservative under the E number E227.

See also

• Potassium bisulfite
• Sodium bisulfite

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