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    Related: Humectant Solvent 1,5-Pentanediol Butylene Glycol
    • 1,3-Propanediol CAS 504-63-2

    1,3-Propanediol CAS 504-63-2

    1,3-Propanediol (CAS 504-63-2) is a linear aliphatic diol, chemically known as Trimethylene glycol, utilized primarily as a versatile monomer in the synthesis of polytrimethylene terephthalate (PTT) polymers and as a solvent in industrial formulations. This clear, colorless 1,3-Dihydroxypropane liquid functions as a chain extender and coupling agent, offering superior reactivity and stability compared to its isomer Propylene Glycol in polyester resin applications. As a fundamental Propane-1,3-diol intermediate, it serves as a critical PDO component for producing high-performance textile fibers, engineering plastics, and heat transfer fluids. We provide this industrial chemical with competitive factory pricing to support polymer polymerization and chemical synthesis operations, ensuring bulk supply availability for large-scale reactor loading. Our logistics team accommodates customized specifications for purity and moisture content, while every shipment is fully documented with MSDS, TDS, COA files to meet safety and manufacturing standards.

    • CAS: 504-63-2
    • Synonyms: Trimethylene glycol, 1,3-Dihydroxypropane, Propane-1,3-diol, PDO, 1,3-Propylene glycol
    • Einecs: 207-997-3
    • Molecular Formula: C3H8O2
    • Grade: Industrial / cosmetic grade, purity typically ≥99.8% (GC)
    • Package: 25 kg plastic drum, 200 kg steel/plastic drum or IBC tote; other packaging can be arranged according to customer requirements
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    Product Description

    1,3-Propanediol (PDO) is a colorless, viscous, water-miscible diol widely used as an intermediate for polyesters, solvents and cosmetic humectants. With stable quality and reliable supply from Chinese producers, it is suitable for polymers, industrial formulations and personal care applications. 📧 Email: info@industrochem.com for latest spec, price and COA.

    1 Physicochemical Properties
    2 Applications
    3 Storage Conditions
    4 Safety Precautions

    Physicochemical Properties

    ItemTypical Value
    AppearanceColorless, clear, viscous liquid
    Molecular weight76.09 g/mol
    Density1.053 g/mL at 25 °C
    Melting pointapprox. −27 °C
    Boiling pointapprox. 214 °C at 760 mmHg
    Flash point (closed cup)>110 °C
    Refractive index (n²⁰/D)~1.440
    Vapor pressure~0.8 mmHg at 20 °C
    Solubility in waterCompletely miscible
    pH (100 g/L in water, 20 °C)approx. 4.5–7.0

    Applications

    1. Polymer & Resin Intermediate

    • Monomer for polytrimethylene terephthalate (PTT) and other specialty polyesters
    • Improves elasticity, resilience and dyeability in textile fibers and engineering plastics
    • Component for aliphatic polyesters and copolyesters used in films, fibers and molded parts

    2. Solvents, Coatings & Industrial Formulations

    • Solvent or co-solvent in waterborne coatings, inks and adhesives
    • Component in heat-transfer fluids, de-icing and antifreeze formulations as an alternative to ethylene glycol/propylene glycol
    • Intermediate for various oxygenated chemicals and plasticizers

    3. Personal Care & Household Products

    • Humectant and moisturizing agent in skin-care, hair-care, cosmetic and toiletry products
    • Solvent and viscosity modifier in liquid detergents and cleaners
    • Helps improve skin feel and stability of formulations

    4. Other Uses

    • Component in composites, laminates, moldings and other industrial materials
    • R&D intermediate in green chemistry, biobased materials and specialty chemicals

    For related glycol raw materials used in formulation, resin and process systems, see Propylene Glycol and Butylene Glycol.

    Storage Conditions

    • Store in tightly closed drums or IBCs in a cool, dry, well-ventilated warehouse.
    • Recommended storage temperature: below 30 °C, away from direct sunlight and strong heat sources.
    • Keep away from strong oxidizing agents and strong acids/alkalis.
    • Prevent contamination with water or other chemicals to maintain purity.
    • Follow local regulations for storage of chemical substances.

    Safety Precautions

    • 1,3-Propanediol shows relatively low acute toxicity, but may cause mild irritation to eyes and skin on direct contact.
    • Avoid inhalation of mists or vapors; use with adequate ventilation or local exhaust in industrial operations.
    • Wear appropriate PPE: chemical-resistant gloves, safety goggles, protective clothing; use respiratory protection if aerosol or high vapor levels may occur.
    • In case of skin contact: wash with plenty of water and soap. If eye contact occurs: rinse cautiously with water for several minutes and seek medical advice if irritation persists.
    • Prevent release into the environment; contain and collect spills with inert absorbent.
    • Always refer to the product’s Safety Data Sheet (SDS) for detailed hazard, first-aid and transport information.

    FAQ - Technical & Supply Chain

    • Q:

      How does 1,3-Propanediol CAS 504-63-2 differ from Propylene Glycol?

      A: 1,3-Propanediol, also called Trimethylene glycol, is a linear diol with two primary hydroxyl groups separated by three carbon atoms. Propylene Glycol, CAS 57-55-6, is 1,2-Propanediol and has different metabolic, solvent and polymer properties.
    • Q:

      What are the main applications of 1,3-Propanediol CAS 504-63-2?

      A: It is used in the production of PTT polyester, polyurethanes, cosmetic humectants, industrial fluids, coatings and other specialty polymers. Its low irritation and good solvency also make it suitable for personal-care and pharmaceutical formulations.
    • Q:

      Is 1,3-Propanediol suitable for PTT polyester and polyurethane synthesis?

      A: Yes. 1,3-Propanediol is a key monomer for condensation polymerization, especially for polytrimethylene terephthalate and related copolyesters. Confirm monomer purity, water content and color before polymerization.
    • Q:

      What quality specifications should be checked for 1,3-Propanediol CAS 504-63-2?

      A: Confirm GC assay, water content, color, acidity, residual carbonyl, chloride and iron content. Specify industrial or cosmetic grade depending on the end use, and compare the offered batch analysis and technical data against the application requirements.
    • Q:

      How should 1,3-Propanediol CAS 504-63-2 be stored and handled?

      A: Store in tightly closed containers in a cool, dry, well-ventilated area, away from strong oxidizers and open flames. Use normal liquid-chemical handling controls and PPE, and follow the safety information for spill, disposal and first-aid procedures.

    Ordering & Documentation

    Key information for document requests, quotations, and supply planning.

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