← Back

Is Sudan II vegan?

Sudan II is a lysochrome (fat-soluble) azo dye used for staining of triglycerides in frozen sections and some protein-bound lipids and lipoproteins on paraffin sections. It appears as a red powder with a melting point of 156–158 °C and maximum absorption at 493 nm. It is a synthetic organic dye with no animal-derived components.

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.