flavopurpurin

American  

[fley-voh-pur-pyuh-rin] / ˌfleɪ voʊˈpɜr pyə rɪn /

noun

Chemistry.

1. a yellow, crystalline anthraquinone dye, C 14 H 8 O 5 , isomeric with purpurin.

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flavopurpurin British  

/ ˌfleɪvəʊˈpɜːpjʊrɪn /

noun

1. a yellow crystalline dye derived from anthraquinone. Formula: C 14 H 5 O 2 (OH) 3

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Etymology

Origin of flavopurpurin

flavo- + purpurin

Example Sentences

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 Project Gutenberg

Alizarin, Anthrapurpurin and Flavopurpurin give somewhat similar shades with the different mordants, namely, brown with chromium, red with aluminium, orange with tin, and purple with iron.

From Project Gutenberg

It is now known, thanks to the researches of Perkin, Schunck, Roemer, Graebe, and Liebermann, that in the manufacture of artificial alizarin there are produced three distinct coloring matters—alizarin, iso or anthrapurpurin, and flavopurpurin, the two latter being isomers of purpurin.

From Project Gutenberg

Anthrapurpurin and flavopurpurin are obtained from two isomeric disulphanthraquinonic acids, improperly named isoanthraflavic and anthraflavic acids, which are converted into anthrapurpurin and flavopurpurin by a more profound action of potassa.

From Project Gutenberg

Anthrapurpurin and flavopurpurin differ little from each other, though the shades dyed with the latter are more yellow.

From Project Gutenberg