Abstract

U. V. Malankar and K.R. Desai

2-(O-amino phenyl) benzimidazole, a useful diazo component in the preparation of azo dyes, was prepared by condensing anthranilic acid with O-phenylenediamine in poly phosphoric acid. It was diazotised and coupled with various substituted aniline derivatives to give azo dyes. The spectral properties of these dyes are reported. The dyes had generally good colouration and fastness properties on polyester.

Disperse; Dazole; Azo; Polyester

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