Diarylide pigment

Being pigments, these compounds exist as (yellow) powders of low solubility in water.

[1] The formation of diarylide pigments involves the reaction of doubly diazotized aromatic diamines (derivatives of benzidine) with acetoacetanilide.

Worldwide production of organic pigments was estimated to be about 250,000 metric tons (t) in 2006, with about 25%, or 62,500 t, being diarylide yellows.

Single crystals for X-ray crystallography can however be grown from hot solutions in organic solvents.

Due to their stability, diarylide yellows are used in inks, coatings, and as plastic colorants.