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 amino?6-Amino-4-hydroxynaphthalene-2-sulfonic acid, respectively, and?Benzene-1,3-diamine and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid?coupling.

black.