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

These are cochineal, mixed with certain chemicals, hot purpurin sulphuric acid, and the red dye of the banana-eater.

From The Harmsworth Magazine, v. 1, 1898-1899, No. 2 by Various

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

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

Madder contains two closely allied colouring matters, namely, alizarin and purpurin.

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

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

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