Is Blue MX-R vegan?

Blue MX-R

Vegan

Blue MX-R (Reactive Blue 4) is a synthetic reactive anthraquinone dye used in textile dyeing and as a dye ligand in affinity chromatography for protein purification. It is classified under the Colour Index as CI 61205.

Also known as Reactive blue 4
CAS number 13324-20-4
CI number CI 61205
Last reviewed 3 June 2026

Sources

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