Pigment Yellow 81

Pigment Yellow 81
Names
	Other names Benzidine Yellow 10G, Sanyo Pigment Yellow 8105
Identifiers
CAS Number	22094-93-5 ;
3D model (JSmol)	Interactive image;
ChemSpider	80866;
ECHA InfoCard	100.040.691
EC Number	244-776-0;
PubChem CID	89597;
UNII	DGH1X24C9Z ;
CompTox Dashboard (EPA)	DTXSID20865032 ;
	InChI InChI=1S/C36H32Cl4N6O4/c1-17-7-9-29(19(3)11-17)41-35(49)33(21(5)47)45-43-31-15-25(37)23(13-27(31)39)24-14-28(40)32(16-26(24)38)44-46-34(22(6)48)36(50)42-30-10-8-18(2)12-20(30)4/h7-16,33-34H,1-6H3,(H,41,49)(H,42,50)/b45-43+,46-44+ Key: GPWXTTPSHZOIKO-MWOVFPFUSA-N;
	SMILES Cc1cc(C)ccc1NC(=O)C(C(=O)C)/N=N/c2cc(Cl)c(cc2Cl)-c3cc(Cl)c(cc3Cl)/N=N/C(C(=O)C)C(=O)Nc4ccc(C)cc4C;
Properties
Chemical formula	C36H32Cl4N6O4
Molar mass	754.49
Appearance	yellow solid
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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.^[1]

References

^ K. Hunger. W. Herbst "Pigments, Organic" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2012. doi:10.1002/14356007.a20_371