7-Hydroxyheptanoic acid is primarily utilized in the synthesis of various polymers and biodegradable plastics. Its hydroxyl group makes it a valuable intermediate in the production of polyesters and polyurethanes, which are widely used in packaging, textiles, and coatings. Additionally, it serves as a precursor in the development of bio-based lubricants and surfactants, contributing to environmentally friendly industrial applications. In the pharmaceutical industry, it is employed in the synthesis of certain drugs and active pharmaceutical ingredients (APIs), particularly those requiring specific hydroxylated fatty acid structures. Its role in organic synthesis extends to the creation of fine chemicals and specialty compounds used in research and development.