Stearyl HDI/PEG-50 Copolymer
molecular structure · PubChem
AKA: Film-forming polymer, Stearyl polyol copolymer
Plant-Derived
Occlusive
Not Clean
Stearyl HDI/PEG-50 Copolymer is a copolymer of 1,6-hexanediisocyanate, PEG-50 and octadecanol monomers
CAS #
-
Form
Liquid
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Creates Protective Barrier
Traditional Use
Developed in late 20th century cosmetic polymer science. Created as a film-forming and suspending agent to improve product texture and performance in skincare and color cosmetics.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Agencies
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR