Is Di[2-[4-[(E)-2-[4-[bis(2-hydroxyethyl)aminophenyl]vinyl]pyridin-1-ium]butanoyl]aminoethyl]disulfanyl dichloride vegan?

HC Red No. 17 is also known as Di[2-[4-[(E)-2-[4-[bis(2-hydroxyethyl)aminophenyl]vinyl]pyridin-1-ium]butanoyl]aminoethyl]disulfanyl dichloride.

HC Red No. 17 is a synthetic organic dye used in hair colouring products, chemically classified as a pyridinium-based cationic dye.

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