Nonoxynol-3
AKA “ammonium 2-(4-nonylphenoxy)ethyl sulfate, azanium;2-(4-nonylphenoxy)ethyl sulfate”
Synthetic
Ingredient Facts
Nonoxynol-3
AKA: Ammonium 2-(4-nonylphenoxy)ethyl sulfate, Azanium;2-(4-nonylphenoxy)ethyl sulfate
Synthetic · Cleansing · EWG: 4
Synthetic
Cleanser
Emulsifier
Synthetic
Clean
A gentle cleanser that helps remove oil and impurities from skin and hair, leaving them fresh and clean.
Formula
C17H31NO5S
Mol. Weight
361.50
CAS #
31691-97-1
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.
Removes Impurities
Traditional Use
A synthetic non-ionic surfactant developed in the mid-20th century. Used in cosmetics as an emulsifier and solubilizer.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Caution
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR