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carbazole
carbazole (ˈkɑːbəˌzəʊl) n (Dyeing) a colourless insoluble solid obtained from coal tar and used in the production of some dyes. Formula: C12H9N. Also called: diphenylenimine car•ba•zole (ˈkɑr bəˌzoʊl)
n. a white, crystalline compound, C12H9N, used chiefly in making dyes. [1885–90] Carbazole
carbazole[′kär·bə‚zōl] (organic chemistry) One of a group of organic heterocyclic compounds containing a dibenzopyrrole system. Also known as 9-azafluorene. Carbazole dibenzopyrrole, a heterocyclic compound; colorless crystals that are insoluble in water and soluble in organic solvents. Melting point, 245°-247°C; boiling point, 354°-355°C. It is a weak base, forming unstable salts and acids. 
Carbazole is extracted from coal tar (from anthracene oil) andis also prepared synthetically from aminodiphenyl and phe-nanthrene. It is used in the manufacture of dyes, pharmaceuti-cals, and insecticides.[11–1194–1 ] carbazole
car·ba·zole (kar'bă-zōl), Reacts with carbohydrates (including uronates and deoxypentoses) giving colors characteristic of the sugar type; used for assay and analysis of carbohydrates and formaldehyde, and as a dye intermediate; sensitive to ultraviolet light. Synonym(s): 9-azafluorene, diphenylenimine |