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Is Ciba Blue vegan?

Ciba Blue is a synthetic vat dye of the indigoid class, specifically tetrabromoindigo, used in textile dyeing to produce blue shades with high wash fastness. It is classified as Vat Blue 5 in the Colour Index.

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.