Is Fast Yellow AB vegan?

Fast Yellow AB

Vegan

Fast Yellow AB is a synthetic azo dye formerly used as a food colourant (E105) in Europe, now delisted and prohibited in both Europe and the USA due to toxicological concerns including links to non-atopic asthma. It may still be used in non-food applications.

Also known as Acetyl Yellow, Acid Yellow 9, Food Yellow 2
CAS number 2706-28-7
CI number CI 13015
Last reviewed 3 June 2026

Sources

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