Sodium 4-hydroxypentanoate is commonly used in the pharmaceutical industry as an intermediate in the synthesis of various active pharmaceutical ingredients (APIs). It plays a role in the production of drugs targeting neurological disorders, particularly those involving gamma-aminobutyric acid (GABA) pathways, due to its structural similarity to GABA-related compounds. Additionally, it is utilized in the development of biodegradable polymers, contributing to environmentally friendly materials in packaging and medical applications. Its properties also make it suitable for use in cosmetic formulations, where it acts as a moisturizing agent and helps improve skin hydration. In research, it serves as a reagent in organic synthesis for creating complex molecules with potential therapeutic or industrial applications.