Overview
1,3-Propanediol (1,3-PDO) is an organic diol with two hydroxyl groups positioned at the 1 and 3 carbon atoms. It is a key intermediate in chemical synthesis and industrial applications. The compound is produced via chemical or bio-based processes, with the latter gaining traction due to sustainability trends. 1,3-PDO is valued for its biodegradability and low toxicity, making it suitable for environmentally sensitive applications. Its versatility spans industries such as textiles, cosmetics, and automotive, where it serves as a monomer, solvent, or humectant.
Physical and Chemical Properties
1,3-Propanediol is a colorless, odorless liquid with a high boiling point (214°C) and moderate viscosity. It is hygroscopic, readily absorbing moisture from the air, and miscible with water and most organic solvents. The compound exhibits stability under normal conditions but may decompose at high temperatures or in the presence of strong oxidizers. Its molecular structure enables reactivity in polymerization (e.g., polyesters) and esterification reactions. The density (1.053 g/cm³) and low melting point (-32°C) facilitate handling in liquid form for industrial processes.
Main Applications
1,3-PDO is a critical raw material for producing polytrimethylene terephthalate (PTT), a high-performance polymer used in carpets and apparel. Its solvency properties make it ideal for inks, adhesives, and coatings. In cosmetics, it acts as a humectant and emollient in lotions and creams. The automotive industry utilizes 1,3-PDO in antifreeze formulations due to its low toxicity compared to ethylene glycol. Emerging applications include bio-based plastics and pharmaceuticals, leveraging its biodegradability and safety profile.
Safety and Storage
While 1,3-PDO has low acute toxicity, prolonged skin contact or inhalation of vapors may cause irritation. Use gloves, goggles, and respirators in poorly ventilated areas. Store in sealed containers away from heat sources and oxidizers to prevent combustion. Spills should be contained with inert absorbents and disposed of according to local regulations. The compound is biodegradable, but large releases into waterways must be avoided to prevent oxygen depletion in aquatic environments.
B2B Procurement Guide
B2B buyers should prioritize suppliers with ISO or REACH certifications to ensure quality and regulatory compliance. Key specifications include purity (≥99%), water content (<0.2%), and absence of heavy metals. Bulk purchases (drums or totes) typically offer cost savings. Evaluate logistics options, as 1,3-PDO’s hygroscopic nature requires moisture-proof packaging. Request safety data sheets (SDS) and technical bulletins to verify performance for your application. Spot-check batches for consistency in viscosity and color.
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