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Is Sodium Sulfite vegetarian?

Sodium Sulfite

Vegetarian Vegetarian
Vegan Vegan

Sodium Sulfite is an inorganic salt with the formula Na2SO3, used as an antioxidant and preservative in cosmetics and food products. It is produced by treating sodium hydroxide or sodium carbonate with sulfur dioxide.

Also known as Disodium sulfite, Natrii sulfis, Sodium sulphite, Sulfurous acid disodium salt
INCI name Sodium Sulfite
E number E221
INS number 221
CAS number 7757-83-7
EC number 231-821-4
CosIng ID 38095
Last reviewed 22 April 2026

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

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