PEG/PPG-8/3 Diisostearate
AKA “Diisostearate copolymer, Silicone emollient
Synthetic
Ingredient Facts
Peg/ppg-8/3 diisostearate
AKA: Diisostearate copolymer, Silicone emollient
Synthetic · Cleansing · EWG: 4
Plant-Derived Synthetic
Cleanser
Emulsifier
Plant Oil
Synthetic
Clean
A gentle cleansing agent that helps remove oil and dirt while keeping the product smooth and well-blended. Derived from plant-based sources.
CAS #
-
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
A synthetic emulsifier developed in the mid-20th century by combining polyethylene glycol (PEG) and polypropylene glycol (PPG) polymers with fatty acid derivatives. Created to solubilize oils and improve texture in cosmetic formulations without natural precedent.
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
CANADApermitted
Regulatory Agencies
Verified Feb 2026
Data: CosIng · EWG · CIR