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trihydrogen [3-hydroxy-4-[(2-hydroxy-1-naphthyl)azo]-7-nitronaphthalene-1-sulphonato(3-)][4-hydroxy-3-[(2-hydroxy-5-nitrophenyl)azo]-6-(toluene-p-sulphonamido)naphthalene-2-sulphonato(3-)]chromate(3-) related products: