Description

1,3-Propanediol (CAS NO 21398-43-6) is a versatile and high-purity diol monomer essential for advanced polymer synthesis and specialty chemical manufacturing. Its bifunctional structure offers superior reactivity and performance characteristics compared to other glycols, making it a critical building block for high-value applications. This compound is particularly vital for industries focused on sustainable materials, high-performance coatings, and personal care, where consistent quality and reliable supply are paramount.

Application

• Polymer & Resin Production: A key monomer for producing high-performance polyesters like polytrimethylene terephthalate (PTT), offering excellent elasticity, dyeability, and resilience for textiles and engineering plastics.
• Cosmetics & Personal Care: Used as a superior humectant, solvent, and viscosity modifier in skincare, haircare, and oral care formulations, prized for its mildness and moisturizing properties.
• Industrial & Functional Fluids: Serves as a base or intermediate for synthetic lubricants, antifreeze, and heat transfer fluids requiring high thermal stability and low toxicity.
• Pharmaceutical Intermediates: Employed in the synthesis of various active pharmaceutical ingredients (APIs) and prodrugs, leveraging its purity and predictable reactivity.
• Adhesives & Sealants: Functions as a reactive diluent and flexibility enhancer in polyurethane and epoxy-based adhesive systems.
• Food & Flavor Industry: Acts as a carrier solvent and formulation aid for flavors, colors, and food additives, where high purity is essential.

Basic Information

Product Name	1,3-Propanediol
CAS No.	21398-43-6
Molecular Formula	C3H8O2
Molecular Weight	76.09 g/mol
Synonyms	Trimethylene Glycol; 1,3-Dihydroxypropane; Propane-1,3-diol; PDO; Bio-PDO; Zemea® (DuPont trade name); 1,3-Propylene Glycol
EINECS	244-305-5

Quality Control

Our 1,3-Propanediol is manufactured under a strict quality management system to ensure batch-to-batch consistency and reliability. Production adheres to cGMP principles where applicable, and the product can be supplied to meet various industry standards, including cosmetic, pharmaceutical, and food-grade specifications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to guarantee it meets your precise technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure containers are kept tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect product quality. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 99.5%
Water Content (KF)	≤ 0.1%
Specific Gravity (20/20°C)	1.053 - 1.058
Refractive Index (20°C)	1.439 - 1.442
Color (APHA)	≤ 10
Residue on Ignition	≤ 0.05%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.