benzidine dyes
Congo group Con"go group [From {Congo red}.] A group of artificial dyes with an affinity for vegetable fibers, so that no mordant is required. Most of them are azo compounds derived from benzidine or tolidine. Called also {benzidine dyes}. [Webster 1913 Suppl.]

The Collaborative International Dictionary of English. 2000.

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  • Benzidine — IUPAC name 4,4 diaminobiphenyl …   Wikipedia

  • benzidine — [ben′zə dēn΄] n. [< BENZENE] a white or reddish crystalline organic base, NH2C6H4C6H4NH2, used in the manufacture of dyes …   English World dictionary

  • benzidine — /ben zi deen , din/, n. Chem. a grayish, crystalline, slightly water soluble, basic compound, C12H12N2, usually derived from nitrobenzene: used chiefly in the synthesis of certain azo dyes, esp. Congo red. [1875 80; BENZ + ID3 + INE2] * * * ▪… …   Universalium

  • Benzidine — A compound used mainly for dyeing textiles and paper that is a known human carcinogen (cancer causing agent). Benzidine was one of the first chemicals for which an association of occupational exposure and increased incidence of urinary bladder… …   Medical dictionary

  • benzidine — noun Etymology: International Scientific Vocabulary benz + idine Date: circa 1855 a crystalline diamine base C12H12N2 prepared from nitrobenzene and used especially in making dyes …   New Collegiate Dictionary

  • benzidine —    A grayish yellow, white or reddish gray crystalline powder; its an organic synthesis, manufacture of dyes especially of Congo red. Also used for the detection of blood stainand as a stiffening agent in rubber compounding …   Forensic science glossary

  • benzidine — n. chemical compound used in the production of dyes …   English contemporary dictionary

  • benzidine — ben•zi•dine [[t]ˈbɛn zɪˌdin, dɪn[/t]] n. chem. a crystalline base, C12H12N2, used in the synthesis of azo dyes, esp. Congo red • Etymology: 1875–80; benz + idine …   From formal English to slang

  • benzidine — /ˈbɛnzədin/ (say benzuhdeen) noun a carcinogenic, aromatic, diamine compound, NH2C6H4C6H4NH2, used in the manufacture of certain dyes, as Congo red. {benz + id3 + ine2} …   Australian English dictionary

  • benzidine — ˈbenzəˌdēn, də̇n noun ( s) Etymology: probably from German benzidin, blend of benzin benzine and id ide : a white or reddish gray crystalline base NH2C6H4C6H4NH2 made usually by a series of reactions from nitrobenzene and used chiefly in making… …   Useful english dictionary

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