Pigment Yellow 81 is an organic compound that is classified as a diarylide pigment.

It is used as a yellow colorant.

The compound is synthesized from three components.

Treatment of 2,4-dimethylaniline with diketene gives an acetoacetylated aniline.

This compound is then coupled to the bisdiazonium salt obtained from 3,3'-dichlorobenzidine.