rhodoxanthinn.
/rəʊdə(ʊ)ˈzanθɪn/, U.S. /ˌroʊdəˈzænθ(ə)n/ Chemistry.
1. A yellowish-red colouring matter precipitated from a solution of rhodotannic acid by treatment with acid. Now rare.
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1853 Chem. Gaz. 11 45 That procured from the pure acid, to which the author gives the name of rhodoxanthine.
1918 A. G. Perkin & A. E. Everest Nat. Org. Colouring Matters xiii. 450 Rhodotannic acid... Heated with dilute mineral acids, a reddish-yellow precipitate of Rhodoxanthin, C14H14O8, is produced.
2. A red carotenoid pigment occurring in the arils of the yew tree, Taxus baccata, and in other plants, and used in food, pharmaceuticals, and cosmetics as a colouring.Formula: C40H50O2.
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the world > life > biology > substance > pigment > [noun] > plant pigments > red
anchusic acid1833
carthamic acid1838
anchusin1842
brazilin1863
carthamin1863
rhodoxanthin1914
1914 Chem. Abstr. 8 913 With the approach of autumn or winter the green leaves of many plants turn reddish brown or even red. This was found to be due to the formation of a red pigment to which the name of rhodoxanthin is given.
1934 Science 25 May 489/1 Rhodoxanthin, for a number of years classified with the xanthophylls..is now shown to be a ketonic carotene.
1992 Jrnl. Field Ornithol. 63 212 Berries containing that pigment have been hypothesized as the source of rhodoxanthin in these feathers.
This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).
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