Potassium bisulfite

Potassium bisulfite
IUPAC name Potassium hydrogen sulfite
Other names Potassium bisulfite, potassium bisulphite solution, sulfurous acid, monopotassium salt, monopotassium sulfite
Identifiers
CAS number	7773-03-7 Y
PubChem	23663620
ChemSpider	22889 N
Jmol-3D images	Image 1
SMILES OS(=O)[O-].[K+]
InChI InChI=1S/K.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+1;/p-1
Properties
Molecular formula	KHSO3
Molar mass	120.1561 g/mol
Appearance	White crystalline powder
Odor	SO2
Melting point	190 °C (decomp.)
Solubility in water	soluble
Solubility	insoluble in alcohol
N (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Potassium hydrogen sulfite or potassium bisulfite is a chemical compound with the chemical formula KHSO₃. It is used during the production of alcoholic beverages as a sterilising agent. This additive is classified as E number E228 under the current EU approved food additive.^[1]

It is made by the reaction of sulfur dioxide and potassium carbonate. The sulfur dioxide is passed through a solution of the potassium carbonate until no more carbon dioxide is given off. The solution is concentrated and then allowed to crystallize.

See also

• Calcium bisulfiten
• Sodium bisulfiten

References

This inorganic compound-related article is a stub. You can help Wikipedia by expanding it. v t e