Synonyms: | 2-[[6-[[4-[[6-[(4-amino-3-methylbenzoyl)amino]-1-hydroxy-3-sulpho-2-naphthyl]azo]-3-methylbenzoyl]amino]-1-hydroxy-3-sulpho-2-naphthyl]azo]benzoic acid, sodium salt;Benzoic acid, 2-[[6-[[4-[[6-[(4-amino-3- methylbenzoyl)amino]-1-hydroxy-3-sulfo-2-naphthalenyl ]azo]-3-methylbenzoyl]amino]-1-hydroxy-3-sulf o-2-naphthalenyl]azo]-, sodium salt |