C11-15 Pareth-5

C11-15 Pareth-5 molecular structure
molecular structure · PubChem
AKA: Polyoxyethylene alkyl ether
Synthetic
Cleanser
Emulsifier
Clean
OriginDerived from long-chain alcohols and petrochemical ethylene oxide, belonging to the polyethylene glycol ether family. Synthesized through ethoxylation of C11-15 fatty alcohols via reaction with ethylene oxide.
Alcohols, C11-15, ethoxylated (5 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.
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
1
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
Verified Jun 2026
Data: CosIng · EWG · CIR