8-Hydroxyoctanoic acid is primarily used in the synthesis of biodegradable polymers, particularly polyhydroxyalkanoates (PHAs), which are eco-friendly alternatives to conventional plastics. Its hydroxyl group makes it a valuable monomer in creating polymers with enhanced mechanical and thermal properties. Additionally, it serves as an intermediate in the production of specialty chemicals, including lubricants and surfactants, due to its ability to modify surface tension and improve viscosity. In the pharmaceutical industry, it is utilized in the development of drug delivery systems, where its structure aids in the controlled release of active ingredients. Furthermore, it finds applications in cosmetics, contributing to the formulation of moisturizers and emollients that improve skin hydration and texture.