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benzidine
[ ben-zi-deen, -din ]
noun
- 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.
benzidine
/ ˈbɛnzɪˌdiːn; -dɪn /
noun
- a grey or reddish poisonous crystalline powder that is used mainly in the manufacture of dyes, esp Congo red. Formula: NH 2 (C 6 H 4 ) 2 NH 2
benzidine
/ bĕn′zĭ-dēn′ /
- 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: C 12 H 12 N 2 .
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Word History and Origins
Origin of benzidine1
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Example Sentences
Thus diazotised benzidine and tolidine combine with salicylic acid to form valuable yellow azo-dyes known as “chrysamines.”
Benzidine (Wallis) has also been suggested for the detection of free chlorine.
Ellms and Hauser investigated benzidine in 1913 and found it to be inferior to o-tolidine as a test reagent for free chlorine.
It is impossible to attempt to specify by name any of these recent benzidine and tolidine dyes.
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