sodium 3-[[4-[(4-ethoxyphenyl)azo]-5-methoxy-o-tolyl]azo]benzenesulphonate

3-[[4-[(4-Ethoxyphenyl)azo]-5-methoxy-2-methylphenyl]azo]benzenesulfonic acid sodium salt

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