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

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

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

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

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

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