Xanthopurpurin

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Description

Yellow needle crystals. Xanthopurpurin is one of the natural colorants extracted from madder and other Rubiaceae family plants. It dissolves in alkalis to give a red color and turns yellow in acids.

Synonyms and Related Terms

1,3-dihydroxyanthraquinone; CI 75340; purpuroxanthin; xantopurpurina (Esp., Port.)

Other Properties

Soluble in ethanol, benzene.

Melting Point 269-270

Additional Information

H.Schweppe, J.Winter, "Madder and Alizarin", Artists Pigments, Volume 3, E. West FitzHugh (ed.), Oxford University Press: Oxford, 1997.

Sources Checked for Data in Record

  • Artists' Pigments: A Handbook of their History and Characteristics, Elisabeth West FitzHugh, Oxford University Press, Oxford, Vol. 3, 1997 Comment: H.Schweppe, J.Winter, "Madder and Alizarin"

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