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Sulfites are the salts and esters of sulfurous acid. They are strong reducing agents and are used in many ways because of this property. As a natural component, sulfites can be detected in almost all wines.
Sodium sulfite is used in the food industry as a food additive (E 221). It has a germicidal effect and thus counteracts the colonization of bacteria, yeasts and fungi. Sodium sulfite also has an antioxidative and preservative effect, as it blocks certain enzymes and thus prevents the breakdown of vitamins, colorings and flavors promoted by atmospheric oxygen.
Sodium sulfite is used in the following foods, among others:
Since sodium sulfite can destroy the vitamin B1 (thiamine) contained in food, it must not be added to foods that serve to supply thiamine. This applies to the following foods, among others:
Like sodium sulfite, sodium bisulfite is used in the food industry. As a food additive (E 223) it is mainly used as a preservative and antioxidant.
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