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5-[[4-[(3-sulphophenyl)azo]-1-naphthyl]azo]-8-[p-tolylamino]naphthalene-1-sulphonic acid, ammonium sodium salt Structure

5-[[4-[(3-sulphophenyl)azo]-1-naphthyl]azo]-8-[p-tolylamino]naphthalene-1-sulphonic acid, ammonium sodium salt