Key Properties
Propylene Glycol (PG) is a clear, colorless, viscous liquid with the molecular formula C₃H₈O₂ and CAS No. 57-55-6. It is miscible with water and many organic solvents, has low volatility, and provides good moisture-retention performance. PG is widely used as a solvent, humectant, carrier, and chemical intermediate.
Key Features
PG has good solvency, low odor, and excellent hygroscopic properties. It is suitable for food, pharmaceutical, cosmetic, and industrial formulations. Compared with ethylene glycol, propylene glycol has lower toxicity, making it more suitable for applications requiring a higher safety profile.
Main Applications
PG is widely used in food and beverage formulations, pharmaceuticals, cosmetics, personal care products, antifreeze, coolants, hydraulic fluids, coatings, inks, adhesives, and resin systems. It also works as a solvent for flavors, colors, active ingredients, and industrial additives.
Production Process
Propylene Glycol is mainly produced by hydrolysis of propylene oxide, followed by purification and distillation to obtain industrial-grade, food-grade, or pharmaceutical-grade products.
