Benzoic acid,4-((1-hydroxy-6-((((5-hydroxy-7-sulfo-2-naphthalenyl)amino)carbonyl)amino)-3-sulfo-2-naphthalenyl)azo)-,trisodium salt, EINECS 265-364-7, Benzoic acid,4-(2-(1-hydroxy-6-((((5-hydroxy-7-sulfo-2-naphthalenyl)amino)carbonyl)amino)-3-sulfo-2-naphthalenyl)diazenyl)-,sodium salt (1:3), Trisodium 4-((1-hydroxy-6-((((5-hydroxy-7-sulphonato-2-naphthyl)amino)carbonyl)amino)-3-sulphonato-2-naphthyl)azo)benzoate,