PPG-3-Isosteareth-9

AKA: Polypropylene Glycol 3 Isosteareth-9

Plant-Derived

Cleanser

Emulsifier

Clean

OriginDerived from isodecanol, a synthetic fatty alcohol, combined with ethylene oxide and propylene oxide. Produced through ethoxylation and propoxylation reactions, adding ethoxy and propoxy chains to the alcohol backbone.

Isodecanol, ethoxylated, propoxylated (9 mol EO, 3 mol PO average molar ratio)

CAS #

-

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

Yes

Functions

Cleansing

Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.

Emulsifying

Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.

Cleansing Surfactant

Emulsifier

Removes Impurities

Mixes Oil & Water

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.

EWG

CIR

Safe as used

Pregnancy

Yes

Concentration Guide

CIR's newest survey reports no concentration of use.

CIR · report published 2016

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