Is Astra Blue 6GLL vegan?

Astra Blue 6GLL

Vegan

Astra Blue 6GLL (Basic Blue 140) is a synthetic basic dye used primarily in histological staining and as a textile colorant. It is classified under the Colour Index as CI 743516.

Also known as Astrablau, Basic blue 140
CAS number 61724-62-7
CI number CI 743516
Last reviewed 3 June 2026

Sources

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.