5-[[4-[[4-[[6-[(4-amino-3-methylbenzoyl)amino]-1-hydroxy-3-sulpho-2-naphthyl]azo]-3-methylbenzoyl]amino]phenyl]azo]salicylic acid, sodium salt

5-[[4-[[4-[[6-[(4-Amino-3-methylbenzoyl)amino]-1-hydroxy-3-sulfonaphthalene-2-yl]azo]-3-methylbenzoyl]amino]phenyl]azo]-2-hydroxybenzoic acid/sodium,(1:x) salt