2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-((4-((4-((4-hydroxyphenyl)azo)phenyl)amino)-3-sulfophenyl)azo)-6-(phenylazo)- 4-Amino-5-hydroxy-3-((4-((4-((4-hydroxyphenyl)azo)phenyl)amino)-3-sulphophenyl)azo)-6-(phenylazo)naphthalene-2,7-disulphonic acid 62570-24-5 EINECS 263-604-5