Direct Black 91
Name:C.I.Direct Black 91,C.I.30400
Molecular Structure: trisazo class
C.I.Direct Black 91,C.I.30400,CAS 6739-62-4,902.69,C38H25N8Na3O13S,Direct Black RL,Cuprophenyl Black RL,Direct Fast Copper Black AL
Molecular Formula:C38H25N8Na3O13S
Molecular Weight: 902.69
CAS Registry Number:6739-62-4
Manufacturing Methods : 3,3′-Dimethoxylbenzidine double nitriding, First coupled with 2-Hydroxybenzoic acid, coupled with the first again with 2-Amino-5-nitrobenzoic acid diazo, in acid conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid and coupled the product of coupling.
Properties and Applications: red light black. Black powder. Soluble in water, the solution for the red light black, hard to stability. In dyeing of copper (a slight change color in a dark colored light iron ion. Used for cotton, viscose and their blended fabric dyeing, can be in cotton or viscose fabric direct printing can and dispersal dyes with bath dyeing.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4 | 5 | 6-7 | 4-5 | 5 | ||
| AATCC | 7 | 5 | |||||
List of Suppliers:
Classic Direct Black 91 370% (Classic Dyestuffs Inc)
Cuprofix Black CRL Conc (Classic Dyestuffs Inc)
Cuprophenyl Black RL 100%(Classic Dyestuffs Inc)
Direct Black RL 370% ( Global Colors Inc. )
Direct Black RL 370%(Classic Dyestuffs Inc)
Direct Fast Copper Black AL (Colorom SA)
Intramet Black GM Special (Classic Dyestuffs Inc)
Permalite Black RL 370%( Standard Dyes )
Sirius Black CRL (Classic Dyestuffs Inc)
Tertrocuivre Black R(Yorkshire Group pic)
Vilmacupro Black RL( Vilmax SA )