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Trimethylpentanediol/Adipic Acid/Glycerin Crosspolymer
AKA “Polyester Resin, Trimethylpentanediol Adipate Glycerin Crosspolymer”
Acid
Ingredient Facts
Trimethylpentanediol/adipic acid/glycerin crosspolymer
AKA: Polyester Resin, Trimethylpentanediol Adipate Glycerin Crosspolymer
Acid · Skin Conditioning · EWG: 1
Synthetic
Skin Conditioner
Acid
Clean
Hexanedioic acid, crosspolymer with 2,2,4-trimethyl-1,3-pentanediol and 1,2,3-propanetriol
Form
Liquid
State
Solid
See origin →
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Draws water to skin
Locks in moisture
Strengthens skin barrier
Traditional Use
Modern synthetic polymer developed for cosmetics in the late 20th century. Designed to improve texture and stability in skincare formulations and provide skin conditioning properties.
Skin Types
●all-skin-types, gentle
Best For
Dehydration
Pregnancy & Breastfeeding Safe
Yes
Trimethylpentanediol/Adipic Acid/Glycerin Crosspolymer
European Commission
EU Cosmetic Ingredient Database (CosIng)
Trimethylpentanediol/Adipic Acid/Glycerin Crosspolymer
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Allergic Contact Dermatitis to Trimethylpentanediol/Adipic Acid/Glycerin Crosspolymer in a Lip Balm.
Lockmann A, Schill T, Schubert S, Buhl T
Contact dermatitis, 2026
Verified Jun 2026
Data: CosIng · EWG · CIR