purpurin

American  

[pur-pyoo-rin] / ˈpɜr pjʊ rɪn /

noun

Chemistry.

1. a reddish, crystalline, anthraquinone dye, C 1 4 H 5 O 2 (OH) 3 , isomeric with flavopurpurin.

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purpurin British  

/ ˈpɜːpjʊrɪn /

noun

1. a red crystalline compound used as a stain for biological specimens; 1,2,4-trihydroxyanthraquinone. Formula: C 14 H 5 O 2 (OH) 3

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Etymology

Origin of purpurin

1830–40; < Latin purpur ( a ) purple + -in ²

Example Sentences

See Examples For:

purpurin

We may remark that purpurin has not been obtained by direct synthesis.

From Scientific American Supplement, No. 286, June 25, 1881 by Various

Alizarin, purpurin, and the other colouring-matters of madder are hydroxyl derivatives of a compound derived from anthracene by the replacement of two atoms of hydrogen by two atoms of oxygen.

From Coal and What We Get from It by Raphael Meldola

In the roots three coloring matters are obtained: alizarin and purpurin, which are both red, and xanthin, which is yellow.

From Rugs: Oriental and Occidental, Antique & Modern A Handbook for Ready Reference by Rosa Belle Holt

These chemists isolated two compounds which they named alizarin and purpurin.

From Coal and What We Get from It by Raphael Meldola

Red.—Alizarin, anthrapurpurin, flavopurpurin, purpurin, alizarin Bordeaux, alizarin garnet R, alizarin maroon, alizarin S, cloth red, diamine fast red, anthracene red, chrome red, chrome Bordeaux, salicine red, erio chrome red, emin red, milling red.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" by Various