C11-15 Pareth-15
AKA “C11-15 Pareth-15, Pareth-15, Polyoxyethylene alkyl ether
Surfactant
Ingredient Facts
C11-15 pareth-15
AKA: Polyoxyethylene alkyl ether
Surfactant · Cleansing · EWG: 1
Synthetic
Cleanser
Emulsifier
Clean
Alcohols, C11-15, ethoxylated (15 mol EO average molar ratio)
CAS #
173244-48-9
Form
Liquid
See origin →
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
Traditional Use
Synthetic polyethoxylated surfactant developed for cosmetic formulations in the late 20th century. Created to provide stable emulsification and mild cleansing action.
Skin Types
all-skin-types, gentle
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
ewg-1
medical-approval
pregnancy-nursing-safe
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: CosIng · EWG · CIR