Is 2-(4-Amino-2-nitrophenyl)amino-5-dimethylaminobenzoic acid vegan?

HC Blue No. 13 is also known as 2-(4-Amino-2-nitrophenyl)amino-5-dimethylaminobenzoic acid.

HC Blue No. 13 is a synthetic nitroaromatic dye used in semi-permanent hair colorants to impart blue shades.

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