Overview
Diethylhexyl Phthalate (DEHP) is a dominant phthalate ester used primarily as a plasticizer to enhance the flexibility and longevity of polyvinyl chloride (PVC) and other polymers. It accounts for over 50% of global plasticizer consumption due to its cost-effectiveness and performance. DEHP has faced regulatory scrutiny in recent decades due to potential health risks, leading to restricted use in children’s toys and medical devices in some regions. However, it remains critical in industrial applications where alternatives are less viable.
Physical and Chemical Properties
DEHP is a viscous, low-volatility liquid with excellent compatibility with PVC. Its molecular structure includes two ester groups, contributing to its plasticizing effect by embedding between polymer chains and reducing intermolecular forces. The compound exhibits high thermal stability (up to 200°C) and resistance to extraction by water or oils, making it suitable for durable products like cables and automotive coatings. Its insolubility in water limits environmental mobility, though it may bioaccumulate in organisms.
Main Applications
DEHP’s primary use is in flexible PVC products, including flooring (30% of global demand), wire insulation (25%), and synthetic leather (20%). It imparts elasticity and weather resistance to these materials. Non-PVC applications include adhesives, inks, and lubricants. In medical devices (e.g., blood bags), DEHP’s use has declined due to regulatory restrictions, with alternatives like DINP gaining traction in sensitive sectors.
Safety and Storage
DEHP requires careful handling due to potential endocrine-disrupting effects. OSHA recommends workplace exposure limits below 5 mg/m³. Always use PPE (gloves, goggles) and ensure adequate ventilation during processing. Store DEHP in sealed containers made of stainless steel or HDPE, away from oxidizers. Shelf life typically exceeds two years when stored below 30°C. Spills should be contained with inert absorbents and disposed of as hazardous waste.
B2B Procurement Guide
When sourcing DEHP, prioritize suppliers with ISO 9001 certification and batch-specific analysis reports (e.g., gas chromatography purity tests). Key specifications include purity (>99.5%), acid value (<0.1 mg KOH/g), and color (APHA <30). Bulk buyers (20+ metric tons) can negotiate prices down to $900/ton, while small orders (<1 ton) may cost $1,800/ton. Consider regional regulations—EU and U.S. buyers may need phthalate-free alternatives for certain applications.
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