Morindone

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Description

Orange-red needle crystals. Morindone is one of the natural colorants extracted from madder, Lorinda and Coprosma plants in the Rubiaceae family. It dissolves in alkalis and acids to give a blue-violet color but it precipitates with alum lake as an orange red.

Synonyms and Related Terms

1,5,6-trihydroxy-2-methylanthraquinone; CI 75430; morindin

Other Properties

Soluble in methanol, ethanol, ether, benzene, glacial acetic acid. Insoluble in water.

Melting Point 264-275

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"