Synonyms: sodium 4-[[5-[(2,4-dimethylphenyl)azo]-2,4-dihydroxyphenyl]azo]benzenesulphonate;Benzenesulfonic acid, 4-[[5-[(2,4-dimethylphenyl)azo]-2,4-dihydroxyphenyl]azo]-, monosodium salt;4-[[5-[(2,4-Dimethylphenyl)azo]-2,4-dihydroxyphenyl]azo]benzenesulfonic acid sodium salt;Einecs 288-032-3