Trioctyl Trimellitate (TOTM), also known as tri(2-ethylhexyl) trimellitate, is a clear, almost colorless viscous liquid with the formula C30H54O6 and a molecular weight of 546.78 g/mol. This Technical Grade ester offers exceptionally low volatility, a flash point above 240°C, and a boiling point near 414°C.
It is a premium high-temperature plasticizer for PVC, prized for extremely low migration and extraction. These properties make it the preferred choice for medical devices, blood bags, and tubing where plasticizer leaching must be minimized.
TOTM is equally valued in wire and cable insulation rated for 105°C service, automotive interiors, and sealing gaskets. It is produced by esterification of trimellitic anhydride with 2-ethylhexanol.
SoleChem, an ISO 9001:2015 certified chemical supplier based in Türkiye, delivers Trioctyl Trimellitate (CAS 3319-31-1) to customers in more than 40 countries.
Trioctyl Trimellitate
Applications
Primarily used as a plasticizer for PVC in wire/cable insulation, automotive interiors, medical tubing, and flooring for heat resistance and low volatility; in adhesives, coatings, and inks for flexibility; in lubricants as additive; in rubber for processing aid; in research for polymer studies; in food-contact materials as approved by FDA.
Safety & Risks
Low acute toxicity with LD50 oral >5000 mg/kg (rat); mild irritant to eyes/skin/respiratory (H315, H319, H335); not classified as hazardous by GHS but combustible—avoid ignition sources (H227). Incompatible with strong oxidizers; decomposes to COx on heating. Use PPE, ventilate; no carcinogenic effects but monitor chronic exposure.
Packaging
Typically packaged in 200kg or 1000kg iron drums/IBC totes with epoxy lining for corrosion resistance; store in cool, dry, ventilated areas away from heat/oxidizers per SDS guidelines.