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2,3-Dimethylbutane, also known as diisopropyl, is a branched-chain alkane with the chemical formula C6H14. It is one of the six structural isomers of hexane. In this molecule, two methyl groups are attached to the second and third carbon atoms of a butane chain. It is a colorless, flammable liquid at room temperature.

The physical properties of 2,3-dimethylbutane include a boiling point of approximately 90.1 degrees Celsius and a melting point of around -123.5 degrees Celsius. It is insoluble in water but soluble in many organic solvents. As an alkane, it is relatively unreactive, undergoing typical reactions such as combustion and halogenation under specific conditions.

2,3-Dimethylbutane is primarily produced as a component of gasoline, contributing to its octane rating. It can be synthesized through various organic reactions, including the coupling of isopropyl radicals. Its symmetrical structure influences its physical properties compared to other hexane isomers. It is not a common industrial chemical outside of its presence in fuel mixtures and is not typically associated with significant environmental or health concerns beyond those of other volatile organic compounds.