Views: 1 Author: DOBO New Energy Publish Time: 2026-08-20 Origin: Site
TOTM (trioctyl trimellitate) is a high-molecular-weight plasticizer used when a PVC compound needs lower volatility and better heat resistance than many traditional plasticizers can offer. For this grade, the technical data sheet (TDS) lists 7 parameters: ester content ≥ 99.5, color ≤ 50 Pt-Co, specific gravity 0.984-0.991, acid value ≤ 0.1, water content ≤ 0.1, volume resistivity ≥ 10x10^10 Ω·cm and flash point ≥ 240 °C. The table below summarizes these values.
TOTM is the trioctyl ester of trimellitic acid. It is a transparent oily liquid that is blended into PVC resin to improve flexibility, similar in use to other liquid plasticizers, but with a higher molecular weight. In flexible PVC compounding, TOTM is often considered where lower volatility and higher service temperatures are part of the specification.
Parameter | Value |
|---|---|
Ester Content (%) | ≥ 99.5 |
Color (Pt-Co) | ≤ 50 |
Specific Gravity (20°C/20°C) | 0.984 - 0.991 |
Acid Value (mg KOH/g) | ≤ 0.1 |
Water Content (%) | ≤ 0.1 |
Volume Resistivity (Ω·cm) | ≥ 10x10^10 |
Flash Point (°C) | ≥ 240 |
These are the typical values listed for this TOTM grade. Actual batch values should be verified against the documentation provided by the supplier before use.
High flash point (≥ 240 °C) - a value often associated with lower volatility in service.
High volume resistivity (≥ 10x10^10 Ω·cm) - a reference point when evaluating electrical insulation materials.
Ester content (≥ 99.5) - an indicator of purity for this grade.
Low acid value and water content (≤ 0.1) - parameters typically checked for batch consistency.
These properties may be relevant depending on the application; the final performance should always be confirmed by formulation testing.
Heat-resistant PVC cables - TOTM is often evaluated in cable insulation and sheathing compounds that need to hold up at elevated temperatures. See the High Heat-Resistant Plasticizer TOTM for PVC Cables product page.
Automotive interiors - low volatility grades can be relevant for interior parts. See the Low Volatility Trioctyl Trimellitate for Automotive Interiors product page.
Electrical insulation materials - the volume resistivity value supports evaluation for insulation tapes and components. See the High Volume Resistivity TOTM for Electrical Insulation Materials product page.
PVC flooring and mats - durability and resistance to extraction are typical points of interest. See the Fast Gelation TOTM Plasticizer for PVC Floorings and Mats product page.
PVC foam boards and synthetic leather - other application areas where TOTM is considered. See the Trioctyl Trimellitate CAS 3319-31-1 for Industrial PVC Foam Boards product page.
Application fit should always be confirmed by formulation testing, since the final performance depends on the whole compound.
TOTM is used in flexible PVC compounds where lower volatility and better heat resistance may be required, such as heat-resistant cables, automotive interiors, electrical insulation and PVC flooring.
Ester content ≥ 99.5, color ≤ 50 Pt-Co, specific gravity 0.984-0.991, acid value ≤ 0.1 mg KOH/g, water content ≤ 0.1, volume resistivity ≥ 10x10^10 Ω·cm and flash point ≥ 240 °C.
The flash point is ≥ 240 °C.
A volume resistivity of ≥ 10x10^10 Ω·cm is a typical reference point when TOTM is evaluated for electrical insulation materials.
No. TOTM is a trimellitate ester while DOP is a phthalate ester. They have different molecular structures and TDS values, so substitution should always be verified by formulation testing.
Contact DOBO New Energy with your application details to request the current batch TDS and discuss a sample.
TOTM offers a distinct set of TDS values that may be relevant for PVC compounds requiring lower volatility and higher temperature resistance. The 7 parameters in this article are a useful starting point, but the final recipe should always be verified by your technical team.
If you are evaluating TOTM for your application, contact DOBO New Energy to request the current batch TDS.
