Trioctyl Trimellitate (TOTM) is a high-performance plasticizer specially designed for high-temperature and long-life PVC applications. It offers exceptional heat resistance, low volatility, and excellent electrical insulation. TOTM is widely used in wire & cable, automotive interiors, and medical devices where durability and safety are critical.
| Property | Typical Value |
|---|---|
| Chemical Formula | C33H54O6 |
| CAS No. | 3319-31-1 |
| Appearance | Clear, colorless oily liquid |
| Purity | ≥ 99.5% |
| Acid Value | ≤ 0.1 mg KOH/g |
| Density (20 °C) | 0.984 g/cm³ |
| Refractive Index (20 °C) | 1.485 ± 0.003 |
| Flash Point | > 270 °C |
| Concern | TOTM Advantage |
|---|---|
| Need long-term heat resistance | TOTM offers excellent thermal stability |
| Worried about plasticizer loss | Extremely low volatility under heat and pressure |
| Require clean and safe medical-grade additives | TOTM meets many medical regulations |
| Need high electrical insulation | TOTM is widely used in wire and cable coatings |
Q1: Is TOTM suitable for medical-grade PVC?
Yes, specific medical grades of TOTM are available for regulated applications.
Q2: How does TOTM compare to DOP?
TOTM has much lower volatility and better long-term performance in heat and oil resistance.
Q3: Is TOTM phthalate-free?
No. TOTM is a trimellitate ester, not a phthalate. However, it is considered safer and more stable than many traditional phthalates.
