Is Benzenesulfonic acid, 5-chloro-2-(2-(2-hydroxy-1-naphthalenyl)diazenyl)-4-methyl-, barium salt (2:1) vegan?

C.I. Pigment Red 53 is also known as Benzenesulfonic acid, 5-chloro-2-(2-(2-hydroxy-1-naphthalenyl)diazenyl)-4-methyl-, barium salt (2:1).

C.I. Pigment Red 53 is a synthetic azo pigment, the barium salt of a chlorinated hydroxynaphthalene azo dye, used as a colorant in inks, paints, and plastics.

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