Polyglyceryl-6 Undecylenate
AKA “Polyglyceryl-6 Undecylenate
Synthetic
Ingredient Facts
Polyglyceryl-6 undecylenate
Synthetic · Cleansing · EWG: 4
Synthetic
Cleanser
Emulsifier
Synthetic
Clean
Ester of hexaglycerol and undecylenic acid Science: Functions: Surfactant - Emulsifying Safety Ratings: CIR: Safe as used
See origin →
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Emulsifier
Mixes Oil & Water
Traditional Use
A modern synthetic emulsifier developed in the late 20th century. Created to provide natural-origin alternatives to traditional petroleum-based emulsifiers by combining plant-derived glycerin with undecylenic acid, which itself derives from castor oil.
Skin Types
all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Insufficient
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR