3-Hydroxyhexanoic acid is primarily used in the production of biodegradable plastics, particularly polyhydroxyalkanoates (PHAs). These plastics are environmentally friendly alternatives to traditional petroleum-based plastics, as they can decompose naturally in various environments. The compound serves as a monomer in the polymerization process, contributing to the material's flexibility and durability. Additionally, it finds applications in the biomedical field, where it is utilized in the development of drug delivery systems and biodegradable medical implants. Its biocompatibility makes it suitable for use in tissue engineering and regenerative medicine. In the cosmetic industry, it is incorporated into skincare products for its moisturizing and skin-conditioning properties.