Trioctyl Trimellitate (TOTM) is a premium, high-molecular-weight, heat-resistant, and low-volatility primary plasticizer specially developed for PVC compounds requiring long-term performance at elevated temperatures (90–105°C and higher). It offers outstanding resistance to extraction, migration, and volatility while maintaining excellent flexibility and electrical properties.
TOTM is the plasticizer of choice for 90°C, 105°C, and 125°C-rated cables, automotive interior parts, and durable medical applications.

 

Technical Specifications

ITEMS SPECIFICATIONS
Appearance Transparent oily liquid
Content ≥99.5%
Flash Point (open cup method) ≥240℃
Density (σ20), g/cm³ 0.986—0.990
Acidity (as phthalic acid), mgKOH/g ≤0.002
Moisture ≥0.1%
Volume Resistivity, ×10⁹Ω • cm 3

 

Packaging and Storage

  • Net weight 200kg steel drum, 16MT/FCL with pallets.
  • Store in cool place. Keep container tightly closed in a dry and well-ventilated place.

 

Main Advantages of Trioctyl Trimellitate (TOTM)

  • Extremely low volatility and migration – ideal for high-temperature applications
  • Excellent thermal and thermo-oxidative stability up to 125°C continuous use
  • Superior extraction resistance in water, oils, detergents, and soaps
  • Outstanding electrical insulation properties
  • Very good low-temperature flexibility (better than many aromatic trimellitates)
  • Long service life in automotive and wire & cable applications
  • Compatible with PVC, PVAc, PVC/PVDC, NBR, and chlorinated rubber

 

Primary Applications of Trioctyl Trimellitate (TOTM)

  • 90°C, 105°C, and 125°C-rated PVC wire & cable insulation and sheathing
  • Automotive interior parts (instrument panels, door trims, seat covers)
  • Heat-resistant conveyor belts and gaskets
  • Medical tubing and blood bags requiring sterilization resistance
  • High-temperature flexible PVC films and sheets
  • Artificial leather for automotive and furniture
  • Outdoor technical profiles and seals

 

Frequently Asked Questions (FAQs)

What is the main difference between TOTM and DOP/DEHP?
TOTM has dramatically lower volatility and better heat aging performance, making it suitable for continuous use at 105–125°C, while DOP is limited to ~70–80°C applications.

Is TOTM considered a phthalate plasticizer?
Yes, TOTM is a trimellitate ester derived from trimellitic anhydride, but it is not an ortho-phthalate. It is widely accepted as a safer high-temperature alternative to ortho-phthalates.

Can TOTM be used in 105°C automotive cables?
Yes. TOTM is one of the most commonly specified plasticizers for 105°C and 125°C-rated automotive and appliance wiring.

Does TOTM provide good low-temperature performance?
While not as good as DOA, TOTM maintains flexibility down to approximately –30°C to –40°C, which is excellent for a high-heat plasticizer.

 

Where can I buy high-quality Trioctyl Trimellitate (TOTM)?

You can contact us via email [email protected] for offers and bulk orders.