Is E 150 vegan?

Sulphite Ammonia Caramel is also known as E 150.

Sulphite ammonia caramel is a dark brown food colouring produced by heat treatment of carbohydrates in the presence of both sulphite and ammonium compounds. It is one of the four types of caramel colouring and is widely used in colas, sauces, and baked goods.

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