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Is Sirius Red F3B vegan?

Sirius Red F3B

Vegan

Sirius Red F3B, also known as Direct Red 80, is a synthetic azo dye with the molecular formula C45H26N10Na6O21S6. It is primarily used in histological staining methods for collagen and amyloid detection.

Also known as Direct Red 80
CAS number 2610-10-8
CI number CI 35780
Last reviewed 3 June 2026

Sources

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