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