Trioctyl trimellitate

Trioctyl trimellitate (CAS 3319-31-1), also known as TOTM or tris(2-ethylhexyl) trimellitate, is a high-performance plasticizer for demanding polymer and industrial uses.

Where is Trioctyl trimellitate used?

• PVC compounding: preferred plasticizer for wire and cable insulation meeting 90°C and 105°C UL classifications
• Medical-grade PVC tubing and blood bags: low-migration alternative to phthalate plasticizers
• Printing inks and packaging coatings: film flexibility without plasticizer bleed-out during heat-intensive processing or storage
• Personal care: emollient and film-forming agent in long-wear color cosmetics and nail products
• It maintains flexibility where low volatility and high-temperature stability are required over the product's service life.

Good to know: Medical and food-contact grades are available to meet regulatory requirements, designed to meet standards such as USP or EP where applicable.

Commercial specifications

• Purity typically 99% and above for high-specification applications
• Clear, low-viscosity liquid in drum and IBC quantities
• Bulk tanker options for large-volume buyers