Pigment Yellow 10

Pigment Yellow 10
Names
	IUPAC name 4-[(2,5-dichlorophenyl)diazenyl]-5-methyl-2-phenyl-4H-pyrazol-3-one
	Other names Benzidine Yellow 10G, Sanyo Pigment Yellow 8105
Identifiers
CAS Number	6407-75-6 ;
3D model (JSmol)	Interactive image;
ChemSpider	21172416;
ECHA InfoCard	100.026.401
PubChem CID	21118695;
UNII	F4E9M94HBX ;
CompTox Dashboard (EPA)	DTXSID50884296 ;
	InChI InChI=1S/C16H12Cl2N4O/c1-10-15(20-19-14-9-11(17)7-8-13(14)18)16(23)22(21-10)12-5-3-2-4-6-12/h2-9,15H,1H3 Key: SYIDJAUAPDQFRN-UHFFFAOYSA-N;
	SMILES Clc1ccc(Cl)cc1N=Nc2c(C)nn(c2O)-c3ccccc3;
Properties
Chemical formula	C16H12Cl2N4O
Molar mass	347.20 g·mol−1
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 10 is an organic compound that is classified as a monoazopyrazolone pigment. It is used as a yellow colorant, notably as yellow road marking on highways in the US.

The compound is synthesized by coupling the diazonium salt derived from dichloroaniline with the pyrazolone.^[1] The structure of the dye, as determined by X-ray crystallography, consists of planar molecule with a C=O bond and two hydrazone groups.^[2]

[1]

[2]

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