1,2-Propanediol is a key raw material for unsaturated polyesters, epoxy resins, polyurethane resins, plasticizers, and surfactants, accounting for approximately 45% of total propylene glycol consumption. This unsaturated polyester is widely used in surface coatings and reinforced plastics. Due to its excellent viscosity and hygroscopic properties, 1,2-Propanediol is widely used as a desiccant, antifreeze agent, lubricant, and solvent in the food, pharmaceutical, and cosmetic industries. In the food industry, 1,2-Propanediol reacts with fatty acids to form propylene glycol fatty acid esters, which are primarily used as food emulsifiers. 1,2-Propanediol is an excellent solvent for flavorings and pigments. Due to its low toxicity, it is used as a solvent for spices and food colorings in the food industry. In the pharmaceutical industry, 1,2-Propanediol is commonly used as a solvent, softener, and excipient in the manufacture of various ointments and salves. It is also used as a solvent for blending agents, preservatives, ointments, vitamins, penicillin, and more. Due to its good solubility with various flavorings, propylene glycol is also used as a solvent and softener in cosmetics. 1,2-Propanediol is also used as a tobacco moisturizer, mildew inhibitor, lubricant for food processing equipment, and solvent for food marking inks. Its aqueous solution is an effective antifreeze agent. It is also used as a tobacco moisturizer, mildew inhibitor, fruit ripening preservative, antifreeze solution, and heat transfer agent.