2,7-Naphthalenedisulfonic acid, 4-amino-3-((4-(((4-((2-amino-4-hydroxyphenyl)azo)phenyl)amino)carbonyl)phenyl)azo)-5-hydroxy-6-(phenylazo)-, sodium salt 4-Amino-3-((4-(((4-((2-amino-4-hydroxyphenyl)azo)phenyl)amino)carbonyl)phenyl)azo)-5-hydroxy-6-(phenylazo)-2,7-naphthalenedisulfonic acid, sodium salt 72245-57-9