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Purpurin   Listen
noun
Purpurin  n.  (Chem.) A dyestuff resembling alizarin, found in madder root, and extracted as an orange or red crystalline substance.





Collaborative International Dictionary of English 0.48


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"Purpurin" Quotes from Famous Books



... representatives of the madder root, which indeed they have almost entirely displaced. The most recent additions to this important class are the various alizarin Bordeaux. The only dyes in this group which appear somewhat behind the rest in point of fastness are purpurin and alizarin maroon. ...
— Scientific American Supplement, No. 810, July 11, 1891 • Various


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