C.I. Direct Black 151

5-Amino-2-(4-aminophenylamino)benzenesulfonic acid double nitriding, and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid (2 Moore) coupled, 2 further double nitride amino6-Amino-4-hydroxynaphthalene-2-sulfonic acid, respectively, andBenzene-1,3-diamine and 6-Amino-4-hydroxynaphthalene-2-sulfonic acidcoupling.

black.