How to use Benzidine in a sentence

benzidine
  • The latter on reduction yields a diamino compound, the disulphonic acid of which on diazotization and coupling with a phenol, &c., gives valuable substantive cotton dyes after the type yielded by Benzidine.

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  • With diazotized benzidine it gives Congo red.

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  • It is used commercially for the preparation of aniline and of benzidine; and in perfumery (oil of mirbane).

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  • Among such dyestuffs are chrysamine or flavophenine, obtained from salicylic acid and diazotized benzidine, and congo red obtained from sodium naphthionate and diazotized benzidine.

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  • The Benzidine and Semidine Change.-Aromatic hydrazo compounds which contain free para positions are readily converted by the action of acids, acid chlorides and anhydrides into diphenyl derivatives; thus, as mentioned above, hydrazobenzene is converted into benzidine, a small quantity of diphenylin being formed at the same time.

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  • This reaction is known as the benzidine transformation.

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  • See Benzidine for diparadiaminodiphenyl.

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  • Benzidine finds commercial application since its tetrazo compound couples readily with amino-sulphonic acids, phenol carboxylic acids, and phenol and naphthol-sulphonic acids to produce substantive cotton dyes (see Dyeing).

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