sodium 6-amino-4-hydroxy-5-[[4-[[4-[(4-hydroxyphenyl)azo]phenyl]azo]-6-methoxy-m-tolyl]azo]naphthalene-2-sulphonate

6-Amino-4-hydroxy-5-[[4-[[4-[(4-hydroxyphenyl)azo]phenyl]azo]-2-methoxy-5-methylphenyl]azo]-2-naphthalenesulfonic acid sodium salt