Polyglyceryl-5 Isostearate
AKA “Polyglyceryl-5 Isostearate
Surfactant
Ingredient Facts
Polyglyceryl-5 isostearate
Surfactant · Emulsifying · EWG: 4
Plant-Derived
Cleanser
Emulsifier
Not Clean
1,2,3-Propanetriol, homopolymer, isooctadecanoates (1:1) (5 mol glycerol average molar ratio)
CAS #
-
See origin →
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Emulsifier
Mixes Oil & Water
Traditional Use
Created as a modern emulsifier combining polyglycerin with isostearic acid. Formulated to provide improved stability and sensory properties in cosmetic formulations with better skin conditioning effects.
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: CosIng · EWG · CIR