Is Eosine Bluish vegan?

Acid Red 91 is also known as Eosine Bluish.

Eosin B is a synthetic fluorescent acidic dye of the xanthene class, distinguished from Eosin Y by the presence of two bromine and two nitro substituents. It is used as a biological stain and colourant, binding to basic proteins and staining them red or pink.

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