Abstract In the present work discusses synthesis, structural characterization and electrochemical investigation on someazo dyes derived from substituted benzothiazoles. The conventional diazo-coupling method was adopted to afford the heterocyclic azo dyes of benzothiazoles having pyrazole moiety. The obtained azo dyes were characterized by FT-IR, UV–visible, fluorescence, 1HNMR and, mass spectrometric