disodium 5-[[4'-[[6-amino-5-(1H-benzotriazol-4-ylazo)-1-hydroxy-3-sulphonato-2-naphthyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-4-methylsalicylate

5-[[4'-[[6-Amino-5-(1H-benzotriazol-4-ylazo)-1-hydroxy-3-sulfo-2-naphtyl]azo]-3,3'-dimethoxy-1,1'-biphenyl-4-yl]azo]-2-hydroxy-4-methylbenzoic acid disodium salt