C11-15 Pareth-20

C11-15 Pareth-20 molecular structure
molecular structure · PubChem
AKA: Polyoxyethylene alkyl ether
Synthetic
Cleanser
Emulsifier
Not Clean
OriginDerived from C11-15 pareth alcohols, a synthetic compound in the polyethylene glycol ether family. Synthesized through ethoxylation of linear alcohol chains using ethylene oxide.
Alcohols, C11-15, ethoxylated (20 mol EO average molar ratio)
CAS #
173244-48-9
Form
Liquid
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-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2012
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR