Decylbenzene is primarily used as an intermediate in the production of surfactants and detergents. It plays a crucial role in the synthesis of alkylbenzene sulfonates, which are key components in household and industrial cleaning products due to their excellent emulsifying and foaming properties. Additionally, it is utilized in the formulation of lubricants and plasticizers, where it enhances performance and stability. In the chemical industry, decylbenzene serves as a solvent in various processes, particularly in the manufacture of specialty chemicals. Its applications also extend to the production of agrochemicals, where it acts as a carrier or diluent in pesticide formulations.