Is Basic Red 2 vegan?
Basic Red 2
Safranin O is a synthetic biological stain used in histology and cytology as a counterstain, colouring cell nuclei red. It is a classic counterstain in Gram staining and endospore staining, and is also used to detect cartilage, mucin, and mast cell granules.
| Also known as | 3,7-diamino-2,8-dimethyl-5-phenylphenazinium chloride (CI 50240), Basic Red 2, Phenazinium, 3,7-diamino-2,8-dimethyl-5-phenyl-, Safranin, Safranine |
|---|---|
| INCI name | Basic Red 2 |
| CAS number | 477-73-6 |
| EC number | 207-518-8 |
| CI number | CI 50240 |
| CosIng ID | 32077 |
| 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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