Pentadecylbenzene is primarily used as an intermediate in the synthesis of surfactants and detergents. Its long alkyl chain makes it suitable for creating compounds that lower surface tension, enabling effective cleaning and emulsifying properties. It is also utilized in the production of lubricant additives, where it enhances the performance and stability of lubricating oils. Additionally, pentadecylbenzene finds application in the formulation of specialty chemicals for industrial processes, including corrosion inhibitors and fuel additives. Its hydrophobic nature makes it valuable in the development of water-resistant coatings and materials.