TRIOCTYL TRIMELLITATE (TOTM)

Trioctyl Trimellitate is a high-performance trimellitate ester plasticizer used to provide long-term flexibility, low volatility, and excellent heat-aging resistance in PVC and other polymer systems.
Trioctyl Trimellitate is commonly abbreviated as TOTM, and Trioctyl Trimellitate is valued for low migration, good permanence, and strong resistance to extraction by oils and fuels compared with many general-purpose plasticizers.
Trioctyl Trimellitate is widely used in wire and cable insulation, automotive interiors, flexible tubing, and high-temperature PVC applications where durability and regulatory performance requirements are critical.

CAS Number: 3319-31-1
EC Number: 222-020-0
Molecular Formula: C33H54O6
Molecular Weight: 546.78 g/mol

Synonyms: Trioctyl Trimellitate, TOTM, Tris(2-ethylhexyl) Trimellitate, Trioctyl Trimellitate Plasticizer, Trimellitate Ester Plasticizer, TOTM Plasticizer, High Temperature Plasticizer TOTM, Low Volatility Plasticizer, Permanent Plasticizer TOTM, Trimellitic Acid Trioctyl Ester, Plasticizer 3319-31-1, Tris(2-ethylhexyl) Benzene-1,2,4-tricarboxylate, Trioctyl trimellitate, Trioctyl Trimellitate, TRIOCTYL TRIMELLITATE, TOTM, TOTM (Trioctyl Trimellitate), Trioctyl Trimellitate (TOTM), TOTM Plasticizer, Plasticizer TOTM, Trimellitic Acid Trioctyl Ester, Trimellitic acid trioctyl ester, Trimellitic Acid Tri(octyl) Ester, Trimellitic Acid Trioctyl Ester (TOTM), Trioctyl Trimellitate Plasticizer, Trioctyl trimellitate plasticizer, Trimellitate Trioctyl Ester, Trioctyl Trimellitate (trimellitate ester), Trimellitic Triester (C8) (descriptive), Trimellitate Ester (C8 alcohol) (descriptive), Tri(octyl) Trimellitate, Tri-n-octyl Trimellitate, Tri-n-octyl trimellitate, Tri(2-ethylhexyl) Trimellitate (often-used equivalent naming), Tri(2-ethylhexyl) trimellitate, Tris(2-ethylhexyl) Trimellitate, Tris(2-ethylhexyl) trimellitate, Benzene-1,2,4-tricarboxylic acid, tris(2-ethylhexyl) ester (descriptive), 1,2,4-Benzenetricarboxylic Acid Tris(2-ethylhexyl) Ester (descriptive), Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate (descriptive), Trimellitate Plasticizer (TOTM), High Temperature Plasticizer (TOTM) (use context), Low Volatility Plasticizer (TOTM) (use context), Low Migration Plasticizer (TOTM) (use context), Permanent Plasticizer (TOTM) (use context), PVC Plasticizer (TOTM) (use context), Wire & Cable Plasticizer (TOTM) (use context), Cable Compound Plasticizer (TOTM) (use context), Automotive Wire Plasticizer (TOTM) (use context), Heat-Resistant Plasticizer (TOTM) (use context), Electrical Insulation Plasticizer (TOTM) (use context), Trioctyl Trimellitate for PVC, Trioctyl Trimellitate for vinyl, Trioctyl Trimellitate for plastisols (use context),

APPLICATIONS

Trioctyl Trimellitate is used in PVC wire and cable insulation to provide high-temperature flexibility and long-term heat aging resistance.
Trioctyl Trimellitate is incorporated into cable jacketing compounds to reduce volatility and minimize plasticizer loss during service.
Trioctyl Trimellitate is used in automotive wire harness insulation to improve durability under elevated temperature exposure.

Trioctyl Trimellitate is used in high-temperature PVC compounds for industrial cables where low migration and low volatility are required.
Trioctyl Trimellitate is incorporated into flexible PVC formulations for heat-resistant cable applications in compatible designs.
Trioctyl Trimellitate is used in specialty electrical components where long service life and stable mechanical properties are needed.

Trioctyl Trimellitate is used in flexible PVC tubing to provide low extraction and maintain flexibility in contact with oils and fuels.
Trioctyl Trimellitate is incorporated into technical tubing where permanence and low odor are desired, subject to regulatory approval.
Trioctyl Trimellitate is used in automotive fluid handling tubes to reduce plasticizer migration into oils and lubricants.

Trioctyl Trimellitate is used in automotive interior PVC parts to improve low fogging performance and reduce volatility-related emissions.
Trioctyl Trimellitate is incorporated into dashboards, trims, and skins to reduce odor and improve long-term flexibility.
Trioctyl Trimellitate is used in interior components where high-temperature exposure can drive plasticizer loss from standard plasticizers.

Trioctyl Trimellitate is used in PVC films and sheets where low migration and long-term flexibility are important for product durability.
Trioctyl Trimellitate is incorporated into upholstery and synthetic leather to improve permanence and reduce extraction by oils.
Trioctyl Trimellitate is used in protective covers and flexible laminates where long-term softness must be retained.

Trioctyl Trimellitate is used in sealants and gaskets based on flexible PVC to improve resistance to heat and plasticizer loss.
Trioctyl Trimellitate is incorporated into sealing profiles to reduce shrinkage and maintain compression set performance.
Trioctyl Trimellitate is used in vibration-damping PVC components where stable softness improves long-term damping.

Trioctyl Trimellitate is used in high-performance cable compounds to meet strict specifications for volatility, migration, and mechanical retention.
Trioctyl Trimellitate is incorporated into specialty PVC systems where formulation strategy prioritizes stable plasticization.
Trioctyl Trimellitate is used in flexible compounds where long service life under heat stress is required.

Trioctyl Trimellitate is used in polymer blends and specialty elastomers as a plasticizer where compatibility and permanence are verified.
Trioctyl Trimellitate is incorporated into nitrile rubber and other oil-resistant systems in some applications to improve flexibility and processing.
Trioctyl Trimellitate is used in adhesives and coatings to improve flexibility and reduce brittleness in compatible resin systems.

Trioctyl Trimellitate is used in flame-retardant flexible PVC compounds where stable plasticizer content supports consistent fire performance over time.
Trioctyl Trimellitate is incorporated into building cable products where heat aging and extraction resistance are critical.
Trioctyl Trimellitate is used in industrial flexible compounds where long service life under heat stress is required.

Trioctyl Trimellitate is valued because Trioctyl Trimellitate delivers long-term plasticization with low volatility, low migration, and strong heat resistance that supports demanding PVC and flexible polymer applications.

Trioctyl Trimellitate (TOTM) is used as a high-performance plasticizer for flexible PVC.
Trioctyl Trimellitate (TOTM) supports improved heat resistance compared with many general-purpose plasticizers.
Trioctyl Trimellitate (TOTM) helps reduce volatility and plasticizer loss in high-temperature service.

Trioctyl Trimellitate (TOTM) is used in wire and cable insulation compounds that require thermal aging stability.
Trioctyl Trimellitate (TOTM) supports long-term flexibility of cable jackets under elevated temperatures.
Trioctyl Trimellitate (TOTM) helps reduce brittleness and cracking in aging cable formulations.

Trioctyl Trimellitate (TOTM) is used in automotive wiring and under-hood cable applications.
Trioctyl Trimellitate (TOTM) supports resistance to heat cycling in engine-compartment environments.
Trioctyl Trimellitate (TOTM) helps maintain flexibility and insulation integrity over long service life.

Trioctyl Trimellitate (TOTM) is used in appliance wiring compounds that require higher temperature ratings.
Trioctyl Trimellitate (TOTM) supports stable performance in ovens, heaters, and household appliances.
Trioctyl Trimellitate (TOTM) helps reduce plasticizer migration and fogging in enclosed appliances.

Trioctyl Trimellitate (TOTM) is used in industrial power cable sheathing to improve mechanical durability and flexibility.
Trioctyl Trimellitate (TOTM) supports stable elongation and tensile properties during aging.
Trioctyl Trimellitate (TOTM) helps reduce hardening and loss of flexibility over time.

Trioctyl Trimellitate (TOTM) is used in flexible PVC flooring to improve low-volatility performance.
Trioctyl Trimellitate (TOTM) supports reduced odor and reduced emissions in indoor flooring products.
Trioctyl Trimellitate (TOTM) helps maintain flexibility and dimensional stability during long service.

Trioctyl Trimellitate (TOTM) is used in wall coverings and decorative PVC films to reduce staining and plasticizer bleed.
Trioctyl Trimellitate (TOTM) supports improved migration resistance in laminated structures.
Trioctyl Trimellitate (TOTM) helps maintain appearance and adhesion in decorative films.

Trioctyl Trimellitate (TOTM) is used in PVC coated fabrics for automotive interiors and technical textiles.
Trioctyl Trimellitate (TOTM) supports reduced fogging and improved heat aging in cabin materials.
Trioctyl Trimellitate (TOTM) helps maintain softness under flexing and thermal stress.

Trioctyl Trimellitate (TOTM) is used in synthetic leather and upholstery materials to reduce emissions and improve durability.
Trioctyl Trimellitate (TOTM) supports stable softness and reduced surface tack.
Trioctyl Trimellitate (TOTM) helps improve aging performance under heat and light exposure.

Trioctyl Trimellitate (TOTM) is used in automotive interior PVC parts to reduce fogging and windshield haze.
Trioctyl Trimellitate (TOTM) supports low-volatility requirements for interior air quality.
Trioctyl Trimellitate (TOTM) helps reduce plasticizer emissions that cause interior haze.

Trioctyl Trimellitate (TOTM) is used in PVC plastisol formulations for coatings and dipping applications.
Trioctyl Trimellitate (TOTM) supports improved heat stability and reduced fuming during gelling.
Trioctyl Trimellitate (TOTM) helps reduce plasticizer loss in high-temperature curing ovens.

Trioctyl Trimellitate (TOTM) is used in plastisol-based seam sealers and underbody coatings in some automotive systems.
Trioctyl Trimellitate (TOTM) supports durable cured films and stable plastisol viscosity.
Trioctyl Trimellitate (TOTM) helps reduce odor and fogging compared with more volatile plasticizers.

Trioctyl Trimellitate (TOTM) is used in flexible PVC tubing and industrial hoses where low migration is important.
Trioctyl Trimellitate (TOTM) supports long-term kink resistance and flexibility.
Trioctyl Trimellitate (TOTM) helps reduce hardening caused by plasticizer evaporation.

Trioctyl Trimellitate (TOTM) is used in gaskets and seals made from plasticized PVC.
Trioctyl Trimellitate (TOTM) supports long-term sealing performance by maintaining flexibility.
Trioctyl Trimellitate (TOTM) helps reduce compression set drift under heat exposure.

Trioctyl Trimellitate (TOTM) is used in refrigerator door gaskets to maintain flexibility during temperature cycling.
Trioctyl Trimellitate (TOTM) supports durable sealing and reduced brittleness in cold conditions.
Trioctyl Trimellitate (TOTM) helps reduce plasticizer migration that can cause tackiness or dirt pickup.

Trioctyl Trimellitate (TOTM) is used in building and construction flexible membranes and flashing materials in some formulations.
Trioctyl Trimellitate (TOTM) supports improved aging resistance and long-term flexibility.
Trioctyl Trimellitate (TOTM) helps reduce emissions in enclosed-building applications.

Trioctyl Trimellitate (TOTM) is used in PVC films for packaging industrial goods where low transfer is required.
Trioctyl Trimellitate (TOTM) supports stable film flexibility and low tack.
Trioctyl Trimellitate (TOTM) helps reduce plasticizer migration onto packed parts.

Trioctyl Trimellitate (TOTM) is used in PVC-backed adhesive tapes to reduce plasticizer bleed into adhesive layers.
Trioctyl Trimellitate (TOTM) supports stable tape flexibility and long-term adhesion.
Trioctyl Trimellitate (TOTM) helps reduce staining and adhesive softening caused by migration.

Trioctyl Trimellitate (TOTM) is used in calendering and extrusion of flexible PVC to improve processing stability at higher temperatures.
Trioctyl Trimellitate (TOTM) supports stable melt behavior and reduced volatilization losses.
Trioctyl Trimellitate (TOTM) helps improve processing window in high-temperature compounding.

Trioctyl Trimellitate (TOTM) is used in specialty PVC formulations designed for low fogging and low odor performance.
Trioctyl Trimellitate (TOTM) supports improved emission profile due to high molecular weight and low volatility.

DESCRIPTION

Trioctyl Trimellitate is a trimellitic acid triester typically made from trimellitic anhydride and branched C8 alcohols such as 2-ethylhexanol, and the resulting material is a high molecular weight plasticizer with low volatility.
Trioctyl Trimellitate provides plasticization by increasing free volume and chain mobility in PVC, and Trioctyl Trimellitate helps maintain flexibility over time by resisting evaporation and migration.
Trioctyl Trimellitate is often selected for high-temperature applications because Trioctyl Trimellitate shows better retention than many general-purpose plasticizers under heat aging.

Trioctyl Trimellitate is typically a clear to slightly yellow oily liquid with low odor, and Trioctyl Trimellitate has high compatibility with PVC and many flexible compound packages.
Trioctyl Trimellitate can increase compound viscosity compared with lower molecular weight plasticizers, so processing conditions may be adjusted to achieve target fusion and extrusion behavior.
Trioctyl Trimellitate performance depends on plasticizer loading, stabilizer system, filler content, and polymer grade, so formulation optimization and testing are important.

Trioctyl Trimellitate should be stored in tightly closed containers in a cool, dry place away from strong oxidizers.
Trioctyl Trimellitate spills can create slip hazards, and surfaces should be cleaned thoroughly to remove oily residues.
Trioctyl Trimellitate should be used according to supplier specifications and applicable regulations for the intended market and product category.

Trioctyl Trimellitate (TOTM) is a trimellitate ester plasticizer produced from trimellitic anhydride and C8 alcohols.
Trioctyl Trimellitate (TOTM) is typically a clear, colorless to pale liquid with relatively high viscosity.
Trioctyl Trimellitate (TOTM) is valued for low volatility and low migration because of its relatively high molecular weight.

Trioctyl Trimellitate (TOTM) provides long-term flexibility to PVC by reducing intermolecular forces in the polymer matrix.
Trioctyl Trimellitate (TOTM) improves heat aging resistance by resisting evaporation and extraction.
Trioctyl Trimellitate (TOTM) is commonly selected for high-temperature wire and cable applications.

PROPERTIES

Chemical Formula: C33H54O6
Molecular Weight: 546.78 g/mol
Common Name: Trioctyl Trimellitate (TOTM)
Chemical Type: Trimellitate ester plasticizer (high molecular weight plasticizer)
Appearance: Clear to slightly yellow oily liquid
Odor: Low odor
Solubility: Insoluble in water; soluble in many organic solvents; compatible with PVC (system dependent)
Volatility: Very low compared with many general-purpose plasticizers
Migration / Extraction: Low migration and high resistance to oil extraction (system dependent)
Heat Aging: Excellent heat aging resistance and plasticizer retention
Viscosity: Relatively high compared with lower MW plasticizers (temperature dependent)
Density: ~0.98 g/cm³ (typical)
Flash Point: Typically >200°C (high flash point; combustible liquid)
Storage Temperature: 10–30°C, tightly closed
Shelf Life: Typically 24–36 months in original sealed packaging (supplier dependent)

FIRST AID

Inhalation:
Move to fresh air if mists are inhaled during heated processing.
Seek medical attention if respiratory irritation persists.
Avoid breathing aerosols during spraying and hot handling.

Skin Contact:
Wash with soap and water after contact.
Remove contaminated clothing and wash before reuse.
Seek medical advice if irritation develops or persists.

Eye Contact:
Rinse cautiously with water for several minutes.
Remove contact lenses if present and easy to do, then continue rinsing.
Seek medical attention if irritation persists.

Ingestion:
Rinse mouth with water.
Seek medical attention if discomfort occurs or if a significant amount is swallowed.
Never give anything by mouth to an unconscious person.

Note to Physicians:
Treat symptomatically.
No specific antidote is required.
Provide supportive care based on exposure route and symptoms.

HANDLING AND STORAGE

Handling:
Use appropriate PPE including gloves and safety glasses, especially during bulk handling.
Avoid prolonged skin contact and avoid splashing into eyes.
Wash hands after handling and before eating, drinking, or smoking.

Ventilation:
Use general ventilation for normal handling.
Use local exhaust if heated handling generates mists.
Avoid aerosol formation in enclosed spaces without proper ventilation.

Storage:
Store in tightly closed containers in a cool, dry place.
Keep away from strong oxidizers and sources of excessive heat.
Keep containers properly labeled and protected from contamination.

Spill and Leak Procedures:
Contain the spill and absorb with inert material.
Clean surfaces thoroughly because oily plasticizers can create slip hazards.
Dispose of waste according to local regulations and facility procedures.

Handling Precautions:
Verify compatibility and target loading in PVC compound design to balance flexibility, processing viscosity, and long-term permanence.
Control processing temperature and residence time to minimize decomposition and maintain low-odor, low-fogging performance.
Rotate stock using FIFO practices to maintain consistent quality and predictable plasticization performance.