sodium 3-[[3-methoxy-4-[(4-methoxyphenyl)azo]phenyl]azo]benzenesulphonate

Benzenesulfonic acid, 3-3-methoxy-4-(4-methoxyphenyl)azophenylazo-, sodium salt

3-[[3-Methoxy-4-[(4-methoxyphenyl)azo]phenyl]azo]benzenesulfonic acid, sodium salt