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Amaranthum

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Amaranthum

1-(4-sulfo-1-naphthylazo)-2-naphthol-3,6-disulfonate (trisodium salt);an azo dye; a soluble reddish brown powder, the colour turning to magenta red in solution; used as a food and cosmetic colouring agent, and occasionally in histology.

Origin: g. Amaranthon, a never-fading flower