Propan-1,3-diol, also known as 1,3-propanediol, is an organic compound with the chemical formula C3H8O2. It is a colorless, odorless, and hygroscopic liquid used in various industrial applications, including as a solvent, antifreeze, and intermediate in chemical synthesis. Propan-1,3-diol’s properties make it valuable in diverse fields, such as polymers, cosmetics, and pharmaceuticals.