Potassium bisulfite

Potassium bisulfite
Names
IUPAC name
Potassium hydrogen sulfite
Other names
Potassium bisulfite, potassium bisulphite solution, sulfurous acid, monopotassium salt, monopotassium sulfite
Identifiers
7773-03-7 YesY
3D model (Jmol) Interactive image
ChemSpider 22889 N
ECHA InfoCard 100.028.973
EC Number 231-870-1
E number E228 (preservatives)
PubChem 23663620
UNII QJK5LO891P N
Properties
KHSO3
Molar mass 120.1561 g/mol
Appearance White crystalline powder
Odor SO2
Melting point 190 °C (374 °F; 463 K) (decomposes)
49 g/100 mL (20 °C)
115 g/100 mL (100 °C)
Solubility insoluble in alcohol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
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]

Synthesis

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

References

This article is issued from Wikipedia - version of the 6/7/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.