1,3-Propanediol

Basic Information

CAS No.	504-63-2
EC No.	207-997-3
Linear Formula	HOCH2CH2CH2OH
Molecular Weight	76.09 g/mol
Appearance	Colorless viscous liquid
Melting Point	-24.6 °C (lit.)
Boiling Point	210–212 °C (lit.)
Density	1.06 g/mL at 20 °C (lit.)
RIDADR	Not regulated as dangerous goods (typical)
Chemical Structure

Key Applications

• Monomer for high-performance polymer production: 1,3-Propanediol is the primary raw material for polytrimethylene terephthalate (PTT) and related polyesters used in fibers, carpets, textiles, engineering thermoplastics, and films.

• Solvent and formulation ingredient: It serves as an effective solvent, humectant, and viscosity modifier in cosmetics, personal care products, inks, and various industrial formulations.

• Chemical intermediate and chain extender: The diol is employed in the synthesis of thermoplastic polyurethanes, specialty polyesters, and other polymeric systems where it enhances thermal stability and hydrolytic resistance.

• Performance additive in coatings and materials: It improves flexibility, reduces glass transition temperature, and enhances overall properties in powder coatings and liquid polyester polyols.

• Component in functional fluids and coolants: 1,3-Propanediol finds use in antifreeze formulations, engine coolants, and other industrial functional fluids requiring good solvency and low toxicity characteristics.

High purity specifications and strict batch consistency are maintained through rigorous QA procedures, ensuring reliable performance in polymer synthesis and sensitive formulations.

Stable export supply supported by established logistics channels enables consistent availability and timely delivery to customers across global polymer and specialty chemical markets.

Complete SDS, COA and regulatory documentation available facilitates smooth compliance with international safety and transportation standards for industrial procurement.

Professional technical communication and responsive service together with flexible packaging and bulk supply arrangements help meet specific customer requirements in polymer and formulation applications.

Hazards Classification

Not classified as hazardous under GHS (typical). This substance presents a low hazard profile under normal conditions of industrial use and storage, although standard precautions for handling viscous liquids are recommended.