C11-15 Sec-Pareth-12
AKA “C11-15 Sec-Pareth-12, Secondary Pareth-12, Polyoxyethylene alkyl ether”
Surfactant
Ingredient Facts
C11-15 sec-pareth-12
AKA: Secondary Pareth-12, Polyoxyethylene alkyl ether
Surfactant · Cleansing · EWG: 1
Synthetic
Cleanser
Emulsifier
Clean
Alcohols, C11-15-secondary, ethoxylated (12 mol EO average molar ratio)
CAS #
68131-40-8
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 nonionic surfactant developed in the mid-20th century as part of the polyethylene glycol (PEG) ether family. Created to provide gentle cleansing and emulsification properties in cosmetics and personal care products.
Skin Types
●all-skin-types, gentle
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Verified Jun 2026
Data: CosIng · EWG · CIR