Is 1-Naphthalenesulfonic Acid, 4-Hydroxy-, Monosodium Salt vegan?

Sodium Naphthol Sulfonate is also known as 1-Naphthalenesulfonic Acid, 4-Hydroxy-, Monosodium Salt.

Sodium Naphthol Sulfonate is a synthetic organic sodium salt derived from naphthalene, used as a chemical intermediate.

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