Is Naphthol Yellow S vegan?

Naphthol Yellow S

Vegan

Naphthol Yellow S is a synthetic organic dye derived from 1-naphthol. It was formerly used as a food colorant but was delisted in the United States in 1959; it is still used in some analytical and biological applications.

Also known as Acid Yellow 1, Food Yellow 1, Sulfur Yellow S
CAS number 846-70-8
CI number CI 10316
Last reviewed 3 June 2026

Sources

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