2,4-Dinitrophenylhydrazine (Cat No.:R042586) is an organic compound with the formula C₆H₆N₄O₄, commonly used as a reagent in analytical chemistry for detecting carbonyl compounds such as aldehydes and ketones. It forms brightly colored hydrazone derivatives, aiding in compound identification and purification. DNPH appears as a red to orange crystalline solid and is sparingly soluble in water but soluble in acids and organic solvents. It is widely used in laboratory settings for qualitative and quantitative analysis. DNPH is potentially explosive when dry and must be stored and handled carefully under controlled, moist conditions.