Is Disodium 7-benzamido-4-hydroxy-3-[[4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate (CI 28160) vegan?

Direct Red 81 is also known as Disodium 7-benzamido-4-hydroxy-3-[[4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate (CI 28160).

Sirius Red 4B, also known as Chlorantine Fast Red 5B or Direct Red 81, is a synthetic azo dye used in histological staining applications. It is listed in the Colour Index as CI 28160.

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