Octane-1,3-diol is primarily used in the formulation of personal care products, such as skin creams and lotions, due to its moisturizing properties. It helps to improve skin hydration and maintain the skin's natural barrier function. Additionally, it is utilized in the production of synthetic lubricants and as an intermediate in organic synthesis, particularly in the creation of specialty chemicals. Its ability to act as a solvent and stabilizer also makes it valuable in various industrial applications.