C11-15 Pareth-40

AKA: Polyoxyethylene alkyl ether

Synthetic

Cleanser

Clean

OriginDerived from fatty alcohols and ethylene oxide, typically sourced from petroleum or natural oils. Synthesized through ethoxylation, where ethylene oxide chains are added to fatty alcohol precursors.

Alcohols, C11-15, ethoxylated (40 mol EO average molar ratio)

CAS #

173244-48-9

Form

Liquid

Skin Types

●all-skin-types, gentle

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.

Cleansing

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

Removes Impurities

Cleansing Surfactant

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 2012

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