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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
/ -dɪn; ˈbɛnzɪˌdiːn /
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
/ ĕ′ĭ-ŧ′ /
- 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 .
yvlog History and Origins
Origin of benzidine1
Example Sentences
The EPA has declared one commonly used clothing dye ingredient, benzidine, and its derivatives to be “reasonably anticipated to be human carcinogens.”
Why this is Great: Yellow 6, one of the colors currently being used in the pasta dish, contains benzidine and 4-amino-biphenyl, two known human carcinogens.
Considered from the chemical point of 747 view, they are mostly alkali salts of sulphonated tetrazo colours obtained by diazotizing certain diamido compounds, e.g. benzidine, diamido-stilbene, &c., and uniting the products thus obtained with various amines or phenols.
If the para-nitraniline used in the foregoing process is replaced by meta-nitraniline, a yellowish-orange colour is obtained; with α-naphthylamine, a claret-red; with amido-azo-toluene, a brownish red; with benzidine, a dark chocolate; with dianisidine, a dark blue; and so on.
Among them: > The Labor Department's 1973 declaration of zero tolerance levels in industry for ten widely used chemicals, including benzidine and beta-naphthylamine.
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