Is 1,3-Propanediol (CAS 504-63-2) chemically identical to Propylene Glycol (1,2-Propanediol)?

No, these are structural isomers; this substance has hydroxyl groups at the 1 and 3 positions (C3H8O2), resulting in different reactivity and physical properties compared to 1,2-propanediol.

What is the main industrial utility of this diol in polymer manufacturing?

It serves as the essential glycol component for synthesizing Polytrimethylene Terephthalate (PTT), a polyester known for its superior stain resistance and elastic recovery in textile applications.

1,3-Propanediol CAS 504-63-2

1,3-Propanediol (CAS 504-63-2) is a colorless, viscous liquid diol and linear aliphatic compound primarily utilized as a key monomer in the production of polytrimethylene terephthalate (PTT) polymers and as a versatile solvent in industrial formulations. This Trimethylene glycol compound functions as a chain extender and humectant in Propane-1,3-diol based systems, imparting excellent elasticity to carpet fibers and superior moisturizing properties to personal care ingredients compared to traditional glycols. To support industrial-scale requirements, we provide bulk supply with competitive factory pricing and ensure rigorous quality control through customized specifications alongside standard technical documentation, including MSDS, TDS, COA.

CAS: 504-63-2
Synonyms: Trimethylene glycol, Propane-1,3-diol, 1,3-Dihydroxypropane, Bio-PDO, 1,3-Propylene glycol
Einecs: 207-997-3
Molecular Formula: C3H8O2
Grade: Industrial grade 99%
Package: 200kg iron drum or 50kg plastic drum packing

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Product Description

1,3-propanediol (propan-1,3-diol), is an organic compound with the molecular formula C3H8O2, with a molecular weight of 76.10, a colorless transparent viscous liquid.

It can be used for the synthesis of a variety of drugs, new polyester PTT, pharmaceutical intermediates and new antioxidants.

molecular formula：C3H8O2

molecular weight：76.10

Melting point (°C)：-27

Boiling point (°C)：210-211

solubilityIt is miscible with water and can be miscible in ethanol and ether

Main uses：It can be used for the synthesis of a variety of drugs, new polyester PTT, pharmaceutical intermediates and new antioxidants

Explosion hazard：This product is flammable

Health hazards:Non-irritating effect on eyes and skin

Hazardous characteristics： It is flammable in the event of open flames and high heat.

Harmful combustion products： carbon monoxide

Prohibited distribution：Acyl chloride,anhydride, oxidizing agent, reducing agent.

Body protection：Wear general work protective clothing

EINECS login number：207-997-3

CAS login number：504-63-2

FAQ - Technical & Supply Chain

Q:
Is 1,3-Propanediol (CAS 504-63-2) chemically identical to Propylene Glycol (1,2-Propanediol)?

A: No, these are structural isomers; this substance has hydroxyl groups at the 1 and 3 positions (C3H8O2), resulting in different reactivity and physical properties compared to 1,2-propanediol.
Q:
What is the main industrial utility of this diol in polymer manufacturing?

A: It serves as the essential glycol component for synthesizing Polytrimethylene Terephthalate (PTT), a polyester known for its superior stain resistance and elastic recovery in textile applications.

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