Are sulphites vegan?

Sulphites are inorganic chemical compounds containing the sulfite ion, widely used as preservatives and antioxidants in food and beverage manufacturing. They can occur naturally during the fermentation process, but commercial food additives are produced synthetically. Manufacturers typically synthesize them by burning elemental sulfur to create sulfur dioxide gas, which is then dissolved in water or reacted with alkaline mineral salts like sodium carbonate or potassium hydroxide to produce specific compounds such as sodium metabisulfite or potassium bisulfite.

These additives appear frequently on ingredient lists for wine, beer, dried fruits, fruit juices, vinegars, jams, and processed potato products to prevent bacterial growth and enzymatic browning. On packaged foods, they are often declared broadly as sulphites, or listed under specific chemical names and European food additive numbers from E220 through E228.

sulphites is vegan because they are derived entirely from mineral and synthetic sources. Animal-derived materials, tissues, and byproducts are not used at any stage of their chemical synthesis or processing.