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DMI ref. omg028     Image title: 2,4-Dinitrophenylhydrazine | 30.58 Copyright 2006 David Malin Images 2,4-Dinitrophenylhydrazine (CAS# 119-26-6) is a reddish, crystalline compound. It is unstable (explodes) when heated and is toxic. In the form of Brady's reagent is used as a test for for carbonyl compounds (aldehydes and ketones) and has other industrial chemical uses. Polarized light.