Triethylhexyl Trimellitate

Triethylhexyl Trimellitate 1
molecular structure · PubChem CID 18725
AKA: 3319-31-1, TRIS(2-ETHYLHEXYL) TRIMELLITATE, Totm, Tri-2-ethylhexyl trimellitate, Staflex TOTM, Morflex 510, Hatcol 200, Trimex T 08, 1, 2, 4-Benzenetricarboxylic acid, Tris(2-ethylhexyl) ester, Monosizer W710L
Synthetic
Emollient
Skin Conditioner
Clean
OriginSynthesized from trimellitic acid and a branched-chain alcohol (triethylhexanol) within the phthalate ester chemical family. Produced through direct esterification reaction of trimellitic acid with triethylhexanol under catalytic conditions.
1,2,4-Benzenetricarboxylic acid, tris(2-ethylhexyl) ester
Solubility less than 1 mg/mL at 68 °F (NTP, 1992)
Formula
C33H54O6
Mol. Weight
546.80
CAS #
3319-31-1
Form
Liquid
State
Tris(2-ethylhexyl) trimellitate is a yellow oily liquid. (NTP, 1992)
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
Functions
Plasticiser
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Locks In Moisture
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
2
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
2 studies / 2 not sensitizing (CIR 690)
Not an Eye Irritant
1 study / 1 not irritating (CIR 690)
Mixed Skin Irritation Results
3 studies / 2 irritating / 1 not irritating / reactions moderate to severe (CIR 690)
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR