1-Hydroxy-2-((4-((4-((2,4-diaminophenyl)azo)phenyl)amino)-3-sulfophenyl)azo)-7-((4-aminophenyl)azo)-8-aminonaphthalene-3,6-disulfonic acid 2,7-Naphthalenedisulfonic acid, 4-amino-3-((4-aminophenyl)azo)-6-((4-((4-((2,4-diaminophenyl)azo)phenyl)amino)-3-sulfophenyl)azo)-5-hydroxy- 72939-52-7