2-Methylpropane-1,2-diol, also known as 2-methyl-1,2-propanediol, is a branched-chain diol with the molecular formula C4H10O2. It is a colorless, viscous liquid that is miscible with water and many organic solvents. Its structure features two hydroxyl groups, one primary and one tertiary, which influences its reactivity and physical properties. The primary industrial application of 2-methylpropane-1,2-diol is as a chemical intermediate. It serves as a key building block in the synthesis of various derivatives, most notably as a precursor for the production of certain types of nonionic surfactants and emulsifiers. These surfactants find use in a range of formulations, including industrial and household cleaning products, where they contribute to wetting, foaming, and detergency. Its branched structure can impart specific performance characteristics to the final surfactant molecules. Additionally, due to its diol functionality, it can be used as a monomer or co-monomer in the synthesis of certain polyesters and polyurethanes, contributing to the polymer's properties. It is also investigated as a component in some specialty solvent systems. As with many glycols, standard safety precautions for handling organic chemicals should be observed.