Is Thionin vegetarian?
Thionin
Thionin (also known as Lauth's violet) is a synthetic cationic thiazine dye used as a biological stain in histology and microscopy. It is a small synthetic organic molecule and should not be confused with thionins, which are a family of plant proteins. It is produced entirely from synthetic precursors.
| Also known as | Lauth's Violet |
|---|---|
| CAS number | 581-64-6 |
| CI number | CI 52000 |
| Last reviewed | 3 June 2026 |
An ingredient is considered vegetarian if it avoids components derived from killing an animal.
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.