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Is Coomassie Brilliant Blue vegan?

Coomassie Brilliant Blue

Vegan

Coomassie Brilliant Blue is the name of two similar triphenylmethane dyes (R-250 and G-250) originally developed for the textile industry and now widely used for staining proteins in analytical biochemistry. The name "Coomassie" is a registered trademark of Imperial Chemical Industries. The G-250 variant differs from R-250 by the addition of two methyl groups.

Also known as Acid Blue 83, Brilliant Blue R, Coomassie Brilliant Blue G-250, Coomassie Brilliant Blue R-250
CAS number 6104-59-2
EC number 228-077-7
CI number CI 42660
Last reviewed 3 June 2026

Sources

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