4-Amino-6-[(4-aminophenyl)azo]-3-[[4'-[[5-[(4-aminophenyl)azo]-2,4-diaminophenyl]azo][1,1'-biphenyl]-4-yl]azo]-5-hydroxynaphthalene-2,7-disulfonic acid disodium salt

4-(4-Aminophenyl)benzenamine double nitriding, first in acid conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acidcoupling, again with Benzene-1,3-diamine coupling, N-(3-aminophenyl)acetamide (2 Moore) diazo, a in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid, a neighborhood of light matches, a and Benzene-1,3-diamine coupling, and then hydrolyzed acylamino.

green and black.