alizarin (natural colorant)

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Scope note
A red colorant extracted along with purpurin from the roots of the madder plant; it is one of ten distinct isomers of dihydroxy anthraquinone. It has been used as a dye and pigment since ancient times. The colorant was first isolated in 1862 by Colin and Robiquet in France; For the synthetic colorant first produced in 1869, use "synthetic alizarin."
alizarin
Accepted term: 18-Nov-2024