Iron, complexes with diazotized 2-amino-4-nitrophenol coupled with diazotized sodium 3-amino-2-hydroxy-5-nitrobenzenesulfonate (1:1) and resorcinol, sodium salts;sodium; 3-amino-2-hydroxy-5-nitro-benzenesulfonate; 2-amino-4-nitro-phenol; benzene-1,3-diol; iron; sodium
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