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Is Safranin O vegan?

Safranin O

Vegan

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 Basic Red 2
CAS number 477-73-6
CI number CI 50240
Last reviewed 3 June 2026

Sources

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