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[Studies on coloring constituents in commercial madder color]
Eisei Shikenjo Hokoku. Bulletin of National Institute of Hygienic Sciences
|January 1, 1989
Abstract:
Two main coloring constituents in the commercial madder color were isolated and identified as ruberthric acid and lucidin-3-O-primeveroside. On quantitative analysis by high-performance liquid chromatography, the contents of ruberthric acid and lucidin-3-O-primeveroside in commercial madder color were determined 0.07% and 0.04%, respectively.