dye|World dye variety

Name:C.I.Direct Brown 202,C.I.34035

Molecular Structure: trisazo class

C.I.Direct Brown 202,C.I.34035,CAS 6661-43-4,688.64,C30H22N6Na2O7S2,Sirius Supra Brown R-LL,Sirius Supra Brown RLL

Molecular Formula:C₃₀H₂₂N₆Na₂O₇S₂

Molecular Weight: 688.64

CAS Registry Number:6661-43-4

Manufacturing Methods : 4-((4-Aminophenyl)diazenyl)benzenesulfonic acid diazo, and 5-Aminonaphthalene-2-sulfonic acid coupling, again diazo, coupled with phenol. Finally ethylated.

Properties and Applications: Yellowish light red to brown

List of Suppliers:

Sirius Supra Brown R-LL( IG Farbenindustrie AG )

Sirius Supra Brown RLL Conc(Classic Dyestuffs Inc)