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Is Nigrosin WS vegan?

Nigrosin WS is a water-soluble anionic form of nigrosin, produced by sulfonation of nigrosin. It is a black synthetic dye used in biological staining, inks, and as a colorant in various industrial applications, classified as Acid Black 2.

Classifications are made to the best of our knowledge based on available scientific and regulatory sources. We cannot guarantee the accuracy of every entry, errors in the sources we draw from can always occur. This tool also cannot account for cross-contamination, which depends entirely on individual suppliers and producers. If you believe a classification is incorrect, you can report an issue.