1978-10-4

2,4-Dinitrophenylhydrazine, CAS NO: 1978-10-4, is an organic compound with the molecular formula C6H4N4O4. It is an orange-red crystalline solid that is soluble in warm water and has a melting point of 107-108 °C. This compound is an intermediate in the synthesis of dyes and pigments, and is also used in the synthesis of pharmaceuticals, explosives, and other organic compounds.

2,4-Dinitrophenylhydrazine is used as a reagent for the detection of aldehydes and ketones in organic reactions. It forms insoluble dinitrophenylhydrazones when reacted with carbonyl compounds, which can then be separated and identified through thin-layer chromatography. It is also used to detect the presence of reducing sugars, such as glucose, in solution.

2,4-Dinitrophenylhydrazine is also used in organic synthesis as an intermediate to prepare other compounds. It is used to synthesize 2-chloro-3-nitrophenol, which can be used to make azo dyes, and 2-nitro-5-methoxybenzaldehyde, which is used in the synthesis of certain pharmaceuticals.

2,4-Dinitrophenylhydrazine is toxic if ingested and can cause irritation to the skin and eyes. It should be handled with extreme care in a well-ventilated area and protective clothing should be worn. It should be stored in a cool, dry place away from sources of heat and ignition.