1,2-Heptanediol is primarily used in the cosmetics and personal care industry as a humectant and moisturizing agent. It helps to retain moisture in the skin, making it a common ingredient in lotions, creams, and serums. Its antimicrobial properties also make it effective in preserving cosmetic formulations, extending their shelf life. Additionally, it is used in hair care products to improve texture and manageability. In some cases, it serves as a solvent or stabilizer in various formulations, enhancing the performance of other active ingredients. Its mild and non-irritating nature makes it suitable for sensitive skin applications.