Sodium bisulfite
Sodium bisulfite (or sodium hydrogen sulfite) is a chemical compound with the chemical formula NaHSO3. Sodium bisulfite is a food additive with E number E222. This salt of bisulfite can be prepared by bubbling sulfur dioxide in a solution of sodium carbonate in water. Sodium bisulfite in contact with chlorine bleach (aqueous solution of sodium hypochlorite) will release harmful fumes.
Uses[edit | edit source]
Sodium bisulfite is used in almost all commercial wines, to prevent oxidation and preserve flavor. In the food industry, it is used as a preservative for fruits and vegetables, and in the treatment of dried foods. It is also used in the analysis of methylation status of cytosine in DNA.
Health Effects[edit | edit source]
Ingestion of sodium bisulfite may result in gastrointestinal upset and irritation of the gastric mucosa. In severe cases, life-threatening situations may occur due to metabolic acidosis and shock. Sodium bisulfite can also cause allergic reactions, especially in those sensitive to sulfites.
Environmental Impact[edit | edit source]
Sodium bisulfite is harmful to aquatic life with long lasting effects. It is also harmful to the ozone layer.
See Also[edit | edit source]
References[edit | edit source]
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Contributors: Prab R. Tumpati, MD