Pigment Yellow 83
Chemical compound
From Wikipedia, the free encyclopedia
Color Index Pigment Yellow 83 is an organic compound that is classified as a diarylide pigment. It is used as a yellow colorant.
 | |
| Names | |
|---|---|
| Other names
Enceprint Yellow 1780, Homapol Yellow PO-227 | |
| Identifiers | |
3D model (JSmol) |
|
| ChemSpider | |
| ECHA InfoCard | 100.024.491 |
| EC Number |
|
PubChem CID |
|
| UNII | |
CompTox Dashboard (EPA) |
|
| |
| |
| Properties | |
| C36H32Cl4N6O8 | |
| Molar mass | 818.49 g·mol−1 |
| Appearance | Yellow solid |
| Density | 1.32 g/cm3 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Production
The compound is produced industrially from three components: Treatment of 2,5-dimethoxy-4-chloroaniline with diketene gives an acetoacetylated aniline. This compound is then coupled to the bisdiazonium salt obtained from 3,3'-dichlorobenzidine.[1]
Properties
Pigment Yellow 83 is a slightly flammable yellow solid that is practically insoluble in water. It decomposes when heated above 300 °C.[2] It exhibits a crystal structure belonging to the space group P21/c or space group Pc.[3]
As confirmed by X-ray crystallography, the compound exists as a bis(keto-hydrazide) tautomer, not a true diazo compound.[4]