benzidine

benzidine

[ben-zi-deen, -din]
noun Chemistry.
a grayish, crystalline, slightly water-soluble, basic compound, C 12 H 12 N 2 , usually derived from nitrobenzene: used chiefly in the synthesis of certain azo dyes, especially Congo red.

Origin:
1875–80; benz- + -id3 + -ine2

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World English Dictionary
benzidine (ˈbɛnzɪˌdiːn, -dɪn)
 
n
a grey or reddish poisonous crystalline powder that is used mainly in the manufacture of dyes, esp Congo red. Formula: NH2(C6H4)2NH2

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

benzidine ben·zi·dine (běn'zĭ-dēn')
n.
A yellowish, white, or reddish-gray crystalline powder used in dyes and to detect blood.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
benzidine   (běn'zĭ-dēn')  Pronunciation Key 
A yellowish, white, or reddish-gray crystalline powder that is produced synthetically and is carcinogenic. It is used in making dyes, as a reagent, and in detecting blood stains. Chemical formula: C12H12N2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

benzidine

an organic chemical belonging to the class of amines and used in making numerous dyestuffs. The azo dyes derived from benzidine are important because, unlike simpler classes of azo dyes, they become strongly fixed to cotton without a mordant.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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