Is Basic Blue 17 vegan?
Basic Blue 17
Toluidine Blue is a blue cationic (basic) synthetic thiazine dye used in histology for staining tissues and sometimes clinically as a diagnostic stain. It stains nucleic acids and acidic tissue components intensely blue to violet. It is produced entirely from synthetic precursors.
| Also known as | Basic Blue 17, TBO, Tolonium Chloride, Toluidine Blue |
|---|---|
| CAS number | 92-31-9 |
| CI number | CI 52040 |
| Last reviewed | 3 June 2026 |
An ingredient is considered vegan if it contains no animal-derived components at any point in its production.
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