CheckVegan

Is Sulfur Dioxide vegetarian?

Sulfur Dioxide

Vegetarian Vegetarian
Vegan Vegan

Sulfur dioxide is a colorless, toxic gas with a pungent odor, produced industrially by burning sulfur or roasting metal sulfide ores. It is used as a preservative and antioxidant in food and beverages, and as a fumigant and bleaching agent.

Also known as SO2, Sulfurous Anhydride, Sulphur Dioxide
E number E220
INS number 220
CAS number 7446-09-5
EC number 231-195-2
Last reviewed 16 April 2026

An ingredient is considered vegetarian if it avoids components derived from killing an animal.

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