Is 8,18-Dichloro-5,15-diethyl-5,15-dihydrodiindolo[3,2-b:3',2'-m]triphenodioxazine vegan?

Pigment Violet 23 is also known as 8,18-Dichloro-5,15-diethyl-5,15-dihydrodiindolo[3,2-b:3',2'-m]triphenodioxazine.

CI 51319, known as Pigment Violet 23, is a synthetic dioxazine pigment derived from carbazoles, prepared by condensation of chloranil and 3-amino-N-ethylcarbazole.

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