Polyglyceryl-5 Triisostearate
AKA “Polyglyceryl-5 Triisostearate
Synthetic
Ingredient Facts
Polyglyceryl-5 triisostearate
Synthetic · Cleansing · EWG: 4
Plant-Derived Synthetic
Cleanser
Emulsifier
Synthetic
Clean
Polyglyceryl-5 Triisostearate is the triester of Isostearic Acid and Polyglycerin-5 Science: Origin: Botanic/Natural | Functions: Cleansing, Surfactant - Emulsifying Safety Ratings: CIR: Safe as used
CAS #
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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
Emulsifier
Removes dirt and impurities
Mixes oil and water
Traditional Use
Developed as a sophisticated emulsifier combining polyglycerin with isostearic acid for enhanced conditioning. Created in the late 20th century to provide luxury cosmetic formulations with improved texture and skin benefits.
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