PEG-20 Glyceryl Diisostearate
AKA “Polyethylene glycol 20 glyceryl diisostearate, PEG 20 glyceryl diisostearate
Synthetic
Ingredient Facts
Peg-20 glyceryl diisostearate
AKA: Polyethylene glycol 20 glyceryl diisostearate, PEG 20 glyceryl diisostearate
Synthetic · Cleansing · EWG: 4
Plant-Derived Synthetic
Cleanser
Emulsifier
Plant Oil
Synthetic
Clean
Science: Origin: Botanic/Natural | Process: Ethoxylation | Functions: Surfactant - Cleansing, Surfactant - Emulsifying Safety Ratings: CIR: Safe as used
CAS #
-
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.
Surfactant Cleansing
Surfactant Emulsifying
Moisturizing
Locks in moisture to keep skin soft and supple throughout the day
Strengthens Barrier
Lifts away dirt and oil
Mixes oil and water
Traditional Use
A modern synthetic emulsifier developed in the late 20th century by chemically combining glycerin (historically used as a humectant in skincare) with isostearic acid and polyethylene glycol to create a stable, water-soluble ingredient for cosmetic formulations.
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
medical-approval
all-shades-safe
Regulatory Status
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR