2,7-Naphthalenedisulfonic acid, 3-((4-((2-hydroxy-6-sulfo-1-naphthalenyl)azo)phenyl)azo)-4-amino-5-hydroxy-6-(phenylazo)- 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-((4-((2-hydroxy-6-sulfo-1-naphthalenyl)azo)phenyl)azo)-6-(phenylazo)- 72845-88-6