Pigment Orange 13 CAS 3520-72-7

CAS number：3520-72-7
molecular formula：C32H24Cl2N8O2
molecular weight：623.49
EINECS number：222-530-3

calcotoneoranger;carnelioorangeg;dainichifastorangerr;daltolitefastorangeg;diarylideorange;eljonfastorangeg;fastbenzideneorangeyb3;fastonaorangeg

Pigments;Organic Pigments;Chemical Materials;Organics;Dyes and Pigments

Boiling point	825.5±65.0 °C(Predicted)
Density	1.5522 (rough estimate)
Vapor Pressure	0Pa at 25℃
Refractive index	1.6100 (estimate)
Storage conditions	Room Temperature, under inert atmosphere
Color index	21110
Shape	Solid
Acidity coefficient(pKa)	1.55±0.70(Predicted)
Color	Orange to Dark Orange
LogP	1.17 at 24℃ and pH7
CAS database	3520-72-7(CAS DataBase Reference)

Yellow-orange powder. not soluble in water. The body is light, soft and delicate, with strong tinting strength and good fastness.

● rubber industry.

● Used for coloring ink, plastic, rubber, pigment printing paste and stationery

● The 3,3'-dichlorobenzidine is diazotized with nitrous acid and then coupled with 1-phenyl-3-methyl-5-pyrazolone.