Munjistin

Description

Orange leaflet crystals. Munjistin is one of the natural colorants extracted from madder and munjeet roots. It dissolves in alkalis to give a red solution and turns yellow in acids. Munjistin precipitates with alum to give a bright orange color. It has been used with an alum mordant to dye wool orange.

Synonyms and Related Terms

1,3-dihydroxyanthraquinone-2-carboxylic acid; CI 75370; munjistina (Esp., Port.)

Physical and Chemical Properties

Soluble in boiling water, ether, benzene, hot glacial acetic acid. Slightly soluble in cold water.

Melting Point	232-233 C

Resources and Citations

• 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"