Murexide

Murexide
Murexide Mu*rex"ide, n. [L. murex the purple fish, purple.] (Chem.) A crystalline nitrogenous substance ({C8H8N6O6}, 5-5'-nitrilodibarbituric acid monoammonium salt) having a splendid dichroism, being green by reflected light and garnet-red by transmitted light. It was formerly used in dyeing calico, and was obtained in a large quantities from guano. It is now synthesized from alloxan. Formerly called also {ammonium purpurate}. [1913 Webster +PJC]

The Collaborative International Dictionary of English. 2000.

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  • Murexide — IUPAC name Ammonium 2,6 dioxo 5 [(2,4,6 trioxo 5 hexahydropyrimidinylidene)amino] 3H pyrimidin 4 olate …   Wikipedia

  • murexide — (mu rè ksi d ) s. m. Terme de chimie. Purpurate d ammoniaque. ÉTYMOLOGIE    Lat. murex, pourpre. SUPPLÉMENT AU DICTIONNAIRE    MUREXIDE. Ajoutez : •   C est en 1856 que l on trouva pour la première fois dans le commerce un rouge amarantin très… …   Dictionnaire de la Langue Française d'Émile Littré

  • murexide — The ammonium salt of purpuric acid, formerly used as a dye but superseded by the aniline colors. * * * mu·rex·ide myu̇ rek .sīd n a red crystalline compound C8H8N6O6 having a green luster, forming purple red solutions with water, formerly used as …   Medical dictionary

  • murexide test — n a reaction giving rise to murexide when uric acid or a related compound is heated with nitric acid and the product is treated with ammonia called also murexide reaction …   Medical dictionary

  • murexide reaction — noun or murexide test : a reaction giving rise to murexide when uric acid or a related compound is heated with nitric acid and the product is treated with ammonia …   Useful english dictionary

  • murexide test — noun see murexide reaction * * * Biochem. a test in which treatment of a substance, usually urine, with nitric acid and ammonia indicates the presence of uric acid by formation of murexide …   Useful english dictionary

  • murexide test — Biochem. a test in which treatment of a substance, usually urine, with nitric acid and ammonia indicates the presence of uric acid by formation of murexide. * * * …   Universalium

  • murexide — /myoo rek suyd, sid/, n. Chem. a reddish purple, crystalline, sparingly water soluble solid, C8H8N6O6, having a green luster, formerly used as a dye. Also called ammonium purpurate. [1830 40; MUREX + IDE] * * * …   Universalium

  • murexide — noun Ammonium purpurate, the ammonium salt of purpuric acid, used as a complexometric indicator and a colorimetric reagent …   Wiktionary

  • murexide — n. crystalline nitrogenous substance appearing green by reflected light and garnet red by transmitted light that was formerly used as a dye (Chemistry) …   English contemporary dictionary

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