Steareth-100/PEG-136/HDI Copolymer
molecular structure · PubChem
AKA: Modified Polyethylene Glycol Polymer
Plant-Derived
Clean
Poly(Oxy-1,2-Ethanediyl), alpha-Hydro-theta-Hydroxy, Polymer with 1,6-Diisocyanatohexane and alpha-Octadecyl-theta-Hydroxypoly(Oxy-1,2- ethanediyl)
CAS #
103777-69-1
Form
Liquid
Functions
Viscosity Controlling
Controls Viscosity
Traditional Use
A complex synthetic polymer created in the late 20th century as a film-former and thickener for advanced cosmetic formulations requiring enhanced stability and texture.
EWG
2
CIR
Safe as used
Pregnancy
—
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Agencies
Skin Types
●all-skin-types
Best For
General
The paper trail
🔬Peer-reviewed1 paper →
⚖️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