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Dioctyl Terephthalate (DOTP), also known as Bis(2-ethylhexyl) terephthalate (DEHT), is a premium non-phthalate plasticizer rapidly replacing traditional ortho-phthalates in high-performance PVC applications. With the CAS number 6422-86-2 and chemical formula C₂₄H₃₈O₄, it is produced via esterification of terephthalic acid (PTA) with 2-ethylhexanol, appearing as a colorless transparent oily liquid with excellent thermal stability.
DOTP combines superior electrical insulation, low volatility, exceptional heat resistance (up to 70°C continuous service), and full REACH/RoHS compliance. As the industry shifts toward safer, sustainable alternatives, DOTP has become the plasticizer of choice for demanding applications where performance and regulatory compliance cannot be compromised.
DOTP's phthalate-free profile and superior thermal-electrical properties make it the premium alternative to DOP across safety-critical and high-performance sectors.
DOTP is the dominant plasticizer in premium PVC cable insulation and sheathing compounds, delivering outstanding volume resistivity and heat resistance up to 70°C continuous service. It is the industry standard for building wiring, automotive cables, and high-voltage power cables where long-term electrical safety and low migration are essential.
In instrument panels, door trims, seat upholstery, and wire harness coatings, DOTP provides low fogging, minimal odor, and excellent UV resistance. Its low volatility prevents volatile organic compound (VOC) buildup inside vehicle cabins, meeting stringent OEM specifications for interior air quality.
As a fully phthalate-free plasticizer, DOTP is widely adopted in soft PVC toys, inflatable products, and children's articles where DOP/DEHP is restricted under EU REACH and US CPSIA regulations. It offers the same flexibility and durability without the regulatory risk.
DOTP enhances the softness, tensile strength, and surface finish of PVC synthetic leather used in furniture, footwear, and fashion accessories. Its excellent migration resistance ensures long-lasting product aesthetics and touch.
In nitrocellulose lacquers, industrial adhesives, and flexible sealants, DOTP improves film flexibility, adhesion, and gloss while maintaining compatibility across a wide range of resin systems.
