Direct Brown 202
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
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4 | 3 | 6-7 | 2 | 2-3 | 3-4 | 1-2 |
List of Suppliers:
Sirius Supra Brown R-LL( IG Farbenindustrie AG )
Sirius Supra Brown RLL Conc(Classic Dyestuffs Inc)