HDI/Trimethylol Hexyllactone Crosspolymer

AKA: Polyurethane crosspolymer, Aliphatic HDI polymer

Synthetic

Clean

2-Ethyl-2-hydroxymethyl-1,3-propanediol, polymer with tetrahydro-6-methyl-2H-pyran-2-one, reaction products with 1,6-diisocyanatohexane

Form

Liquid

State

Solid

Functions

Anticaking

Prevents Clumping

Traditional Use

A synthetic crosspolymer developed in the late 20th century combining HDI (hexamethylene diisocyanate) with trimethylol and hexyllactone monomers. Created as a versatile film-forming and texture-modifying agent for modern cosmetic formulations.

EWG

CIR

Safe as used

Pregnancy

Yes

CIR Safety Findings

Not a Sensitizer

medical-approval

all-shades-safe

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

Yes

The paper trail

🔬Peer-reviewednone on file

⚖️Regulatory1 listing →

🛡️Safety-assessed2 reviews →

Counts, not a verdict. A listing isn't a study. The trail, you decide.

Verified Jun 2026

Data: CosIng · EWG · CIR