purpurin

American  

[pur-pyoo-rin] / ˈpɜr pyʊ 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

The only dyes in this group which appear somewhat behind the rest in point of fastness are purpurin and alizarin maroon.

From Scientific American Supplement, No. 810, July 11, 1891 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 Meldola, Raphael

The purpurin, discovered among the colouring-matters of madder in 1826, is a trihydroxy-anthraquinone; it can be prepared by the oxidation of alizarin, as shown by De Lalande in 1874.

From Coal and What We Get from It by Meldola, Raphael

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 Holt, Rosa Belle

Schützenberger and Schiffert, the coloring matters of madder are alizarin, purpurin, pseudopurpurin, purpuroxanthin, and an orange matter, which M. Rosenstiehl considers identical with hydrated purpurin.

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