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Send EmailTrioctyl Trimellitate, Tris 2-ethylhexyl Trimellitate, TOTM, 3319-31-1
TRIOCTYL TRIMELLITATE (TOTM)
CAS Number: 3319-31-1
EC Number (EINECS): 222-020-0
Molecular Formula: C₃₃H₅₄O₆
Molecular Weight: 546.78 g/mol
Chemical Class: Trimellitate ester (plasticizer)
SECTION 1: PRODUCT IDENTIFICATION AND CHEMICAL IDENTITY
| Parameter | Description |
|---|---|
| Chemical Name (IUPAC) | Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate |
| Other Names | TOTM, Trioctyl Trimellitate, Tris 2-ethylhexyl Trimellitate, Tri(2-ethylhexyl) trimellitate, 1,2,4-Benzenetricarboxylic acid tris(2-ethylhexyl) ester |
| CAS Number | 3319-31-1 |
| EC Number (EINECS) | 222-020-0 |
| Molecular Formula | C₃₃H₅₄O₆ |
| Molecular Weight | 546.78 g/mol |
| Chemical Class | Trimellitate ester (plasticizer) |
| Appearance | Clear to slightly yellowish liquid |
| Odor | Mild characteristic |
SECTION 2: PHYSICAL AND CHEMICAL PROPERTIES
| Property | Value / Range |
|---|---|
| Molecular Formula | C₃₃H₅₄O₆ |
| Molecular Weight | 546.78 g/mol |
| Appearance | Clear to slightly yellowish liquid |
| Odor | Mild characteristic |
| Density (20°C) | 0.986 ± 0.002 g/cm³ |
| Specific Gravity (25°C) | ~0.982-0.990 |
| Viscosity (25°C) | ~250-300 cP |
| Viscosity (100°C) | ~10-15 cP |
| Melting / Freezing Point | ~ -50°C |
| Boiling Point | ~400°C (at 760 mmHg) |
| Flash Point | ~210°C (410°F) |
| Autoignition Temperature | ~425°C |
| Vapor Pressure (20°C) | < 0.01 mmHg (very low) |
| Solubility in Water | Insoluble (< 0.01 g/L) |
| Solubility in Organic Solvents | Soluble in most organic solvents |
| Refractive Index (n²⁰D) | ~1.485-1.488 |
| Acid Value | ≤ 0.10 mg KOH/g |
| Water Content | ≤ 0.1% |
| Purity (GC) | ≥ 99.0% |
| Volatility | Very low |
| LogP | ~7.0-8.0 (highly hydrophobic) |
| Dielectric Constant | ~5.0 |
SECTION 3: CHEMICAL PROPERTIES AND REACTIONS
| Property | Description |
|---|---|
| Chemical Class | Trimellitate ester (plasticizer) |
| Functional Group | Ester (-COOR) |
| Reactivity | Low under normal conditions |
| Hydrolysis | Slow hydrolysis in acidic or basic medium |
| Thermal Decomposition | > 400°C releases CO, CO₂ |
| Oxidation | Stable under normal conditions |
| Hydrolytic Stability | Excellent |
| UV Stability | Good |
3.1. Stability
| Parameter | Information |
|---|---|
| Thermal Stability | Excellent (stable up to 400°C) |
| Hydrolytic Stability | Excellent |
| UV Stability | Good |
| Low Volatility | Very low |
| Migration Resistance | Excellent |
| Incompatibilities | Strong oxidizers, strong acids, strong bases |
SECTION 4: FUNCTIONAL PROPERTIES
| Property | Description |
|---|---|
| Plasticizer Type | Primary plasticizer |
| PVC Compatibility | Excellent |
| Low-Temperature Flexibility | Moderate |
| Thermal Stability | Excellent |
| Volatility | Very low |
| Migration Resistance | Excellent |
| Extraction Resistance | Excellent |
| Weathering Resistance | Good |
| Electrical Properties | Excellent |
| Cost/Performance | High (premium plasticizer) |
SECTION 5: MAJOR APPLICATIONS AND END-USES
5.1. High-Temperature Applications (Most Important)
| Application | Function | Suitability |
|---|---|---|
| High-Temperature Cables | Primary plasticizer for heat-resistant cables | High |
| Automotive Cables | Plasticizer for under-hood wiring | High |
| Heat-Resistant Wires | Insulation plasticizer | High |
| Appliance Wiring | Plasticizer for appliance cables | High |
5.2. Medical Applications
| Application | Function | Suitability |
|---|---|---|
| Medical Devices | Plasticizer for medical-grade PVC | High |
| Medical Tubing | Plasticizer for flexible tubing | High |
| Blood Bags | Plasticizer | High |
| IV Bags | Plasticizer | High |
| Surgical Gloves | Plasticizer | High |
5.3. Films and Sheets
| Application | Function | Suitability |
|---|---|---|
| Packaging Films | Plasticizer for flexible packaging | High |
| Protective Coatings | Plasticizer for protective films | High |
| Sheeting | Plasticizer for flexible sheets | High |
5.4. Seals and Gaskets
| Application | Function | Suitability |
|---|---|---|
| Dishwasher Seals | Plasticizer for heat-resistant seals | High |
| Automotive Gaskets | Plasticizer for gaskets | High |
| Industrial Seals | Plasticizer for seals | High |
5.5. Other Applications
| Application | Function | Suitability |
|---|---|---|
| Hoses | Plasticizer for flexible hoses | High |
| Profile Extrusions | Plasticizer for profiles | High |
| Automotive Interiors | Plasticizer for interior parts | High |
| Photo Storage Materials | Plasticizer | High |
| Flooring | Plasticizer | Moderate |
SECTION 6: INDUSTRY SUITABILITY MATRIX
| Industry | Suitability | Explanation |
|---|---|---|
| Wire & Cable | High | High-temperature cables, automotive wiring |
| Medical | High | Medical devices, tubing, blood bags |
| Automotive | High | Under-hood wiring, interiors, gaskets |
| Packaging | High | Flexible packaging films |
| Construction | High | Seals, gaskets, profiles |
| Consumer Goods | Moderate | Various PVC products |
| Food Contact | Limited | Subject to regulatory restrictions |
SECTION 7: TOTM vs DOP/DEHP COMPARISON
| Property | TOTM | DOP/DEHP |
|---|---|---|
| Molecular Weight | 546.78 g/mol | 390.56 g/mol |
| Volatility | Very low | Low |
| Migration Resistance | Excellent | Moderate |
| Thermal Stability | Excellent | Good |
| Low-Temperature Flexibility | Moderate | Excellent |
| Extraction Resistance | Excellent | Moderate |
| Cost | Higher | Lower |
| Applications | High-temperature, medical | General purpose |
SECTION 8: OTHER NAMES AND IDENTIFIERS
| Type | Name / Description |
|---|---|
| IUPAC Name | Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate |
| Commercial Names | TOTM, Trioctyl Trimellitate |
| Synonyms | Tris(2-ethylhexyl) trimellitate, 1,2,4-Benzenetricarboxylic acid tris(2-ethylhexyl) ester |
| CAS Number | 3319-31-1 |
| EC Number | 222-020-0 |
| HS Code | 29173910 |
SECTION 9: TOXICOLOGY AND HEALTH EFFECTS
| Parameter | Value / Description |
|---|---|
| GHS Classification | Not classified |
| Oral LD50 (Rat) | > 5,000 mg/kg |
| Dermal LD50 (Rabbit) | > 2,000 mg/kg |
| Skin Irritation | Mild irritant |
| Eye Irritation | Mild irritant |
| Skin Sensitization | Not sensitizing |
| Mutagenicity | Negative |
| Carcinogenicity | Not classified |
| Reproductive Toxicity | Not classified |
| Endocrine Disruption | No concern |
| Target Organs | Skin, eyes |
SECTION 10: SAFETY AND STORAGE
| Parameter | Information |
|---|---|
| Storage Conditions | Cool, dry, well-ventilated area |
| Temperature | Room temperature (15-30°C) |
| Container | Tightly closed containers |
| Materials to Avoid | Strong oxidizers, strong acids, strong bases |
| Shelf Life | 24 months (under recommended conditions) |
| Packaging | 200 kg drum, 1000 kg IBC, bulk tanker |
SECTION 11: TRANSPORT INFORMATION
| Parameter | Information |
|---|---|
| UN Number | Not regulated (not classified as dangerous goods) |
| Hazard Class | Not applicable |
| Packing Group | Not applicable |
| Proper Shipping Name | Trioctyl Trimellitate |
| ADR/RID | Not regulated |
| IMDG Code | Not regulated |
| IATA (Air) | Not regulated |
| Marine Pollutant | No |
SECTION 12: FIRE-FIGHTING MEASURES
| Parameter | Information |
|---|---|
| Fire Hazard | Combustible liquid (flash point ~210°C) |
| Extinguishing Media | Water fog, foam, CO₂, dry chemical |
| Special Hazards | When heated, releases CO, CO₂ |
| Decomposition Products | CO, CO₂ |
| Protective Equipment | Self-contained breathing apparatus (SCBA), full protective clothing |
SECTION 13: ACCIDENTAL RELEASE AND CLEANUP
| Parameter | Information |
|---|---|
| Personal Protection | Gloves, safety goggles, protective clothing |
| Ventilation | Increase ventilation |
| Cleanup Methods | Absorb with absorbent material; collect in sealed containers |
| Environmental Precautions | Prevent entry into drains |
| Waste Disposal | According to local regulations |
SECTION 14: REGULATORY INFORMATION
| Region / Authority | Status |
|---|---|
| EU REACH | Registered |
| Turkey KKDİK | Registration required |
| USA TSCA | Listed |
| USA FDA | Restricted for food contact |
| California Prop 65 | Not listed (safer alternative to DEHP) |
| EINECS | 222-020-0 |
| WGK (Germany) | 1 (slight hazard to water) |
SECTION 15: SUMMARY AND CRITICAL WARNINGS
Product Summary
| Parameter | Value |
|---|---|
| Product | Trioctyl Trimellitate (TOTM) |
| CAS | 3319-31-1 |
| Appearance | Clear to slightly yellowish liquid |
| Density | 0.986 g/cm³ |
| Molecular Weight | 546.78 g/mol |
| Flash Point | ~210°C |
| Key Industries | Wire & cable, medical, automotive |
CRITICAL WARNINGS
-
Premium High-Temperature Plasticizer: TOTM is a premium plasticizer with excellent thermal stability and very low volatility, making it ideal for high-temperature applications such as automotive cables and appliance wiring.
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Low Migration Resistance: TOTM's high molecular weight (546.78 g/mol) provides excellent migration resistance, making it suitable for medical applications and food contact (where regulated).
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Medical Applications: Due to its low toxicity and migration resistance, TOTM is widely used in medical devices, tubing, blood bags, and IV bags as a safer alternative to DEHP.
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Excellent Electrical Properties: TOTM provides excellent electrical insulation properties, making it ideal for wire and cable applications.
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Safer Alternative to DEHP: TOTM is considered a safer alternative to DEHP for medical and sensitive applications, with no endocrine-disrupting concerns.
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Low Volatility: Very low volatility ensures minimal evaporation loss during processing and long-term service life.
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Good Low-Temperature Flexibility: While not as flexible as DOP at low temperatures, TOTM provides adequate low-temperature performance for most applications.
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Cost: Higher cost than general-purpose plasticizers (DOP, DINP), justified by superior performance in demanding applications.
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Storage: Store in cool, dry, well-ventilated areas. Protect from moisture and strong oxidizers.
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Regulatory Status: Registered under REACH. Subject to regulatory restrictions for food contact applications.
IMPORTANT DISCLAIMER: This Technical Data Sheet (TDS) is for informational purposes only and is based on available technical data. The user is solely responsible for determining the product's suitability for their specific application and for complying with all applicable local, national, and international regulations. For complete safety, storage, handling, transportation, disposal, and regulatory compliance information, always refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier. Users are responsible for testing the product in their own processes and applications. All local, national, and international regulations must be followed when working with TOTM.
