Used as a solvent and chemical intermediate in the production of polymers, particularly in the synthesis of polytrimethylene terephthalate (PTT), a high-performance polyester used in textiles and carpets. It serves as a building block in eco-friendly plastics due to its renewable production methods. Also found in personal care products as a humectant and moisturizer, helping retain skin hydration. Its low toxicity and good solvency make it suitable for cosmetics, pharmaceuticals, and some industrial applications like antifreeze formulations and plasticizers.