Question

Which ketone givespositive test with 2 4 dinitrophenylhydrazine?

Answer 1

Hey frnd
The answer goes like this :-


2,4-Dinitrophenylhydrazine (DNPH, Brady's reagent, Borche's reagent) is the chemical compound C6H3(NO2)2NHNH2. Dinitrophenylhydrazine is a red to orange solid. It is a substituted hydrazine, and is often used to qualitatively test for carbonyl groupsassociated with aldehydes and ketones. The hydrazone derivatives can also be used as evidence toward the identity of the original compound.

The melting point of the derivative is often used, with reference to a database of values, to determine the identity of a specific carbonyl compound. It is relatively sensitive to shock and friction; it is a shock explosive so care must be taken with its use.To reduce its explosive hazard, it is usually supplied wet.

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