alizarin

alizarin
noun Etymology: probably from French alizarine Date: circa 1835 1. an orange or red crystalline compound C14H8O4 formerly prepared from madder and now made synthetically and used especially to dye Turkey reds and in making red pigments 2. any of various acid, mordant, and solvent dyes derived like alizarin proper from anthraquinone

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • alizarin — carmine; n. an orange red dye derived from coal tar and originally isolated from the plant madder (Rubia tinctorum). Alizarin is insoluble in water but dissolves in alkalis, alcohol, and ether. It is used as a pH indicator and as a histochemical… …   The new mediacal dictionary

  • Alizarin — A*liz a*rin, Alizarine A*liz a*rine, n. [F. alizarine, fr. alizari.] (Chem.) A coloring principle, {C14H6O2(OH)2}, found in madder, and now produced artificially as an an orange red crystalline compound from anthracene. It is used in making red… …   The Collaborative International Dictionary of English

  • Alizărin — (Alizzari, Krapproth, Lizarinsäure), C20H6O6 + 4aq., Farbestoff der Krappwurzel, von Robiquet u. Colin entdeckte, dem Musivgold ähnliche gelbe Blättchen, od. rothe, durchsichtige, seidenglänzende Nadeln bildend, wenig in Wasser, leicht in Alkohol …   Pierer's Universal-Lexikon

  • Alizarīn — (von Alizari, einer Sorte Krapp, Krapprot) C14H8O4 oder C6H4.CO.CO.C6H2(OH)2, Farbstoff, findet sich im Krapp als Zersetzungsprodukt der in der frischen Wurzel enthaltenen Ruberythrinsäure, die durch Fermente in A. und Zucker gespalten wird. A.… …   Meyers Großes Konversations-Lexikon

  • Alizarin — Alizarīn, Krapprot, der Farbstoff der Krappwurzel, Dioxyanthrachinon, durchsichtige, orangerote, prismatische Kristalle, in kaltem Wasser fast unlöslich, leicht löslich in Alkohol und Äther, mit Alkalien schöne violette, mit alkalischen Erden und …   Kleines Konversations-Lexikon

  • alizarin — [ə liz′ərin, ə liz′ərēnə liz′ə rin] n. [Ger < Fr & Sp alizari, dried madder root < Ar al ʿ uṣāra, the juice < ʿ aṣara, to press] a reddish yellow crystalline compound, C6H4 (CO) 2C6H2 (OH) 2, produced by oxidizing anthracene and used in… …   English World dictionary

  • Alizarin — Madder lake redirects here. For the Australian band, see Madder Lake (band). Alizarin …   Wikipedia

  • Alizarin — Strukturformel Allgemeines Name Alizarin Andere Namen …   Deutsch Wikipedia

  • alizarin — 1,2 Dihydroxyanthraquinone; a red dye that occurs in the root of madder (Rubia tinctorum and other Rubiaceae) in glucose combination (ruberythric acid) as orange needles, slightly soluble in water; used by the ancients as a dye. Now made… …   Medical dictionary

  • alizarin — /euh liz euhr in/, n. Chem. a solid appearing reddish orange as crystals and brownish yellow as powder, C14H8O4, one of the earliest known dyes, formerly obtained in its natural state from madder and now derived from anthraquinone: used chiefly… …   Universalium

  • Alizarin — Ali|za|rin 〈n. 11; unz.〉 in der Krappwurzel als Ruberythrinsäure vorkommender Naturfarbstoff, der auch synthetisch hergestellt werden kann u. durch Schmelzen von anthrachinosulfosaurem Natrium mit Natriumhydroxyd u. Kaliumchlorat gewonnen wird… …   Universal-Lexikon

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