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Trimethylpentanediol/Adipic Acid/Glycerin Crosspolymer
AKA “Polyester Resin, Trimethylpentanediol Adipate Glycerin Crosspolymer”
Synthetic
Ingredient Facts
Trimethylpentanediol/adipic acid/glycerin crosspolymer
AKA: Polyester Resin, Trimethylpentanediol Adipate Glycerin Crosspolymer
Synthetic · Humectant · EWG: 1
Synthetic
Humectant
Occlusive
Skin Conditioner
Synthetic
Clean
A skin-conditioning agent that helps moisturize and smooth the skin's surface, leaving it feeling soft and hydrated.
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.
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
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
Melanin-Rich Skin
Suitable
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 Feb 2026
Data: CosIng · EWG · CIR