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3-amino-4-hydroxy diphenyl 3-nitro-4-hydroxy diphenyl 5-phenyl benzoxazole a-Naphthol a-Naphthylamine acetic acid acidified added slowly alcohol with bone alcohol yielded alkali amine ANALYSIS azo group barium barium hydroxide benzoate benzoic acid benzoxazole nucleus benzoyl chloride Bleeds Quite Bleeds bone blacking Chem color compound was prepared compound were dissolved concentrated hydrochloric acid corr dehydrothio-p-toluidine derivative was prepared di-sulphonate diazotized dilute alkali diphenyl sulphone dissolved in 500 distilled dye intermediates dyes derived ether excess Fast Fast Brown Fast Fast Fast filtered HCl Calc hydrochloric acid hydroxy diphenyls imidazole Ingrain Ingrain Ingrain methyl chloride mixture obtained Orange oxazole p-phenyl position phenyl group phonate recrystallized from alcohol reported m.p. Resorcinol Sample silk and wool slowly with stirring sodium carbonate sodium chloride sodium nitrite soluble solution was boiled stannous chloride sulpho group sulphuric acid Thioflavine toluene Turns Bleeds Bleeds type of dyes washed with water water bath white product XVII