DEHP Phthalate
DEHP (Di(2-ethylhexyl) phthalate) is a widely utilized chemical compound, primarily employed as a plasticizer to enhance the flexibility and durability of polymers.
Description
Di(2-ethylhexyl) phthalate, commonly abbreviated as DEHP, is a high-molecular-weight phthalate ester with the chemical formula C24H38O4 and CAS Registry Number 117-81-7. It is classified as an organic ester, specifically derived from phthalic acid and 2-ethylhexanol. DEHP functions predominantly as a plasticizer, a substance added to materials, typically plastics, to increase their flexibility, workability, and distensibility. Its chemical structure, featuring two branched alkyl chains, contributes to its excellent plasticizing efficiency and compatibility with a broad range of polymers, including polyvinyl chloride (PVC). The primary mechanism of action involves reducing intermolecular forces within the polymer chains, thereby lowering the glass transition temperature and improving mechanical properties such as tensile strength, elongation at break, and impact resistance. DEHP exhibits low volatility and good thermal stability, making it suitable for applications requiring long-term performance and exposure to varying temperatures. Its widespread historical use underscores its effectiveness in modifying polymer characteristics for diverse industrial and consumer products.
Applications
DEHP has historically been a significant plasticizer across numerous industries. Its primary application lies in the softening of polyvinyl chloride (PVC) for a vast array of products, such as electrical wire insulation, medical devices including intravenous bags and tubing, blood storage bags, catheters, and dialysis equipment, due to its excellent flexibility and durability. Beyond healthcare, it was extensively used in consumer goods like footwear, flooring, artificial leather, automotive interior components, and various types of films and sheets. It also found applications in certain adhesives, sealants, and coatings where increased flexibility was desired. Although its use has been restricted or phased out in many sensitive applications due to health concerns, understanding its historical industrial footprint is crucial.
Storage & Handling
Store in a cool, dry, well-ventilated area, away from direct sunlight and incompatible materials. Keep containers tightly closed. Handle with appropriate personal protective equipment. Avoid prolonged or repeated skin contact and inhalation of vapors. Ensure proper grounding where electrostatic discharge is a concern.
Warning
- H319 Causes serious eye irritation
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