Polyglyceryl-15 Diisostearate
AKA “Polyglyceryl-15 Diisostearate
Synthetic
Ingredient Facts
Polyglyceryl-15 diisostearate
Synthetic · Cleansing · EWG: 4
Plant-Derived Synthetic
Cleanser
Skin Conditioner
Hair Care
Synthetic
Clean
Polyglyceryl-15 Diisostearate is a diester of Isostearic Acid and a glycerin polymer containing 15 glycerin units. Science: Origin: Botanic/Natural | Functions: Cleansing, Hair Conditioning, Surfactant - Cleansing Safety Ratings: CIR: Safe as used
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.
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Removes Impurities
Conditions Hair
Cleansing Surfactant
Removes dirt and impurities
Lifts away dirt and oil
Softens and detangles hair
Traditional Use
Developed in the mid-20th century as a synthetic polyglyceryl ester emulsifier with higher glycerin content. Used in cosmetics to improve formula stability and texture.
Skin Types
all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe w/Qualifications
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR