Brady's reagent. Propanone (acetone, CH3COCH3) reacts with Brady's reagent to form an orange precipitate of 2,4-dinitrophenylhydrazone.

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Keywords: 4-dinitrophenylhydrazine, 4-dinitrophenylhydrazone, acetone, analysis, bradys, carbonyl, carbonyls, chemical, chemicals, chemistry, experiment, group, identification, ketone, precipitate, precipitation, propanone, reaction, reagent, school, test, tube