benzidine
/ben-zi-deen, -din/US // ˈbɛn zɪˌdin, -dɪn //UK // (ˈbɛnzɪˌdiːn, -dɪn) //
联苯胺,联谊赛,联谊会,苯胺
Definitions
n.名词 noun
- 1
Chemistry.
- : a grayish, crystalline, slightly water-soluble, basic compound, C12H12N2, usually derived from nitrobenzene: used chiefly in the synthesis of certain azo dyes, especially Congo red.
Examples
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.
Level 5Browse all words →