Synthesis and properties of disazo acid dyes

Disazo yellow, orange and red dyes have been synthesised, using amines not belonging to MAK III A1 and MAK III A2 groups, as middle components, and derivatives of N,N-dialkylaniline and phenol as final components. The dyes obtained were examined to assess their application and fastness properties, and spectroscopic measurements were used to determine structural properties of the dyes. It was found that the dyes exhausted completely on polyamide fibres from weakly acidic dyebaths and showed high colour fastness to light and water.