Synthesis and application of an alkali-clearable azo disperse dye containing a fluorosulfonyl group and analysis of its alkali-hydrolysis kinetics

An alkali-clearable azo disperse dye containing a fluorosulfonyl group was synthesised. 4-Fluorosulfonylaniline, which was used as the diazo component, was prepared from N-acetylsulfanilyl chloride and coupled with N,N-diethyl-m-toluidine. Pseudo firstorder kinetics were determined by analysis of the dye hydrolysis under alkaline conditions using HPLC. The synthesised dye was also applied to poly(ethyleneterephthalate) and its dyeing and wash fastness properties examined.