sodium 3-[[4-[(4-hydroxyphenyl)azo]-5-methoxy-o-tolyl]azo]-4-methoxybenzenesulphonate

3-[[4-[(4-Hydroxyphenyl)azo]-5-methoxy-2-methylphenyl]azo]-4-methoxybenzenesulfonic acid sodium salt

Benzenesulfonic acid, 3-[[4-[(4-hydroxyphenyl)azo] -5-methoxy-2-methylphenyl]azo]-4-methoxy-, monosodium salt