disodium 5-[[4-[[[4-[[6-amino-1-hydroxy-3-sulphonato-5-(1H-1,2,4-triazole-3-ylazo)-2-naphthyl]azo]-2,5-diethoxyphenyl]amino]carbonyl]phenyl]azo]salicylate

5-[[4-[[[4-[[6-Amino-1-hydroxy-3-sulfo-5-[(1H-1,2,4-triazol-3-yl)azo]-2-naphthalenyl]azo]-2,5-diethoxyphenyl]amino]carbonyl]phenyl]azo]-2-hydroxybenzoic acid disodium salt