Synonyms: Benzoic acid, 5-(2-(4-(2-(6-((2-(2-(2-carboxyphenyl)diazenyl)-1,3-dioxobutyl)amino)-2-hydroxy-4-sulfo-1-naphthalenyl)diazenyl)-3-methoxy-7-sulfo-1-naphthalenyl)diazenyl)-2-hydroxy-, sodium salt (1:4);5-((4-((6-((2-((2-Carboxyphenyl)azo)-1,3-dioxobutyl)amino)-2-hydroxy-4-sulfo-1-naphthalenyl)azo)-3-methoxy-7-sulfo-1-naphthalenyl)azo)-2-hydroxybenzoic acid, tetrasodium salt;Benzoic acid, 5-((4-((6-((2-((2-carboxyphenyl)azo)-1,3-dioxobutyl)amino)-2-hydroxy-4-sulfo-1-naphthalenyl)azo)-3-methoxy-7-sulfo-1-naphthalenyl)azo)-2-hydroxy-, tetrasodium salt;Tetrasodium 5-((4-((6-((2-((2-carboxylatophenyl)azo)-1,3-dioxobutyl)amino)-2-hydroxy-4-sulphonato-1-naphthyl)azo)-3-methoxy-7-sulphonato-1-naphthyl)azo)salicylate;tetrasodium 2-[(E)-(1-{[(5Z)-5-(2-{4-[(2Z)-2-(3-carboxylato-4-oxocyclohexa-2,5-dien-1-ylidene)hydrazinyl]-2-methoxy-6-sulfonatonaphthalen-1-yl}hydrazinylidene)-6-oxo-8-sulfonato-5,6-dihydronaphthalen-2-yl]amino}-1,3-dioxobutan-2-yl)diazenyl]benzoate