2,4-Dimethyl-3-pentanone, systematically named 2,4-dimethylpentan-3-one and commonly known as diisopropyl ketone, is a branched-chain aliphatic ketone with the formula C7H14O. It appears as a colorless, volatile liquid possessing a mild, characteristic ketonic odor. This compound serves primarily as an industrial solvent and intermediate in organic synthesis, particularly for the preparation of pharmaceuticals, fragrances, and specialty chemicals. Its steric hindrance from the isopropyl groups influences reactivity, making it less prone to certain condensation reactions compared to less branched ketones. In flavor chemistry contexts, trace amounts may contribute to sensory profiles in processed foods or essential oils. Physical properties include a density of approximately 0.805 g/cm³ at 20°C and a flash point near 21°C, classifying it as flammable. It is stable under normal conditions but should be stored away from strong oxidizers.