67875-25-6 Benzoic acid, 2-((2-amino-5-hydroxy-7-sulfo-1-naphthalenyl)azo)-5-nitro-, disodium salt Disodium 2-((2-amino-5-hydroxy-7-sulphonato-1-naphthyl)azo)-5-nitrobenzoate EINECS 267-540-9