| Arylide yellow | |
|---|---|
 Color coordinates | |
| Hex triplet | #E9D66B |
| sRGBB (r,g,b) | (233, 214, 107) |
| HSV (h,s,v) | (51°, 54%, 91%) |
| CIELChuv (L,C,h) | (85, 71, 76°) |
| Source | [1][2] |
| ISCC–NBS descriptor | Brilliant greenish yellow |
| B: Normalized to [0–255] (byte) | |
Arylide yellow, also known asHansa yellow andmonoazo yellow, is a family oforganic compounds used aspigments. They are primarily used as industrial colorants includingplastics, building paints and inks. They are also used in artisticoil paints,acrylics andwatercolors. These pigments are usually semi-transparent and range from orange-yellow to yellow-greens. Related organic pigments are thediarylide pigments. Overall, these pigments have partially displaced the toxiccadmium yellow in the marketplace. Painters such asAlexander Calder andJackson Pollock are known to have employed arylide yellow in their artworks.[1]
The compound is obtained byazo coupling ofaniline andacetoacetanilide or their derivatives. The class of compounds was discovered in Germany in 1909. The initially formed diazo compoundtautomerizes to give aketohydrazone, which features extended pi-conjugation.[2]
Members of this class include:
Several monoazo yellows are used as artists' pigments, frequently marketed under the names 'Hansa' or Arylide.[3] These include: