Steareth-100/PEG-136/HDI Copolymer

AKA: Modified Polyethylene Glycol Polymer

Plant-Derived

Clean

OriginDerived from stearic acid and polyethylene glycol (PEG), both petroleum-derived or plant-oil-derived synthetic materials. Synthesized through polyethoxylation and copolymerization reactions to create a polymeric emulsifier and film-forming agent.

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

Skin Types

●all-skin-types

Best For

General

Functions

Viscosity Controlling

Controls Viscosity

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.

EWG

CIR

Safe as used

Pregnancy

—

Restricted By

Credo Beauty Whole Foods Premium Body Care Beauty Heroes MADE SAFE EWG VERIFIED

CIR Safety Findings

Not a Skin Irritant

1 study / 1 not irritating (CIR 704)

Not an Eye Irritant

1 study / 1 not irritating (CIR 704)

Concentration Guide

Leave-on1.6–2.5%

Rinse-off0.87%

0%50%100%

CIR reported use · 2015 survey

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Verified Jun 2026

Data: CosIng · EWG · CIR