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Is Lanosol Yellow 4G vegan?

Lanosol Yellow 4G is a synthetic reactive azo dye used for dyeing textiles, particularly wool and other fibres. It is identified by the Colour Index generic name Reactive Yellow 39 and CI number 18976.

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.