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Is Indigotine vegan?

Indigotine

Vegan

Indigotine (Indigo Carmine, E132) is a synthetic blue azo dye used as a food and cosmetic colorant. Despite its name referencing indigo, it is produced synthetically rather than from the indigo plant.

Also known as 5,5'-Indigodisulfonic acid sodium salt, Acid Blue 74, Blue No. 2, CI73015, FD&C Blue No. 2, Indigo carmine, Soluble Indigo
E number E132
CAS number 860-22-0
EC number 212-728-8
CI number CI 73015
Last reviewed 22 April 2026

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