Polyglyceryl-4 Caprate
AKA “Polyglyceryl-4 Caprate, PEG-4 Caprate, Polyglycerin Caprate”
Surfactant
Ingredient Facts
Polyglyceryl-4 caprate
AKA: PEG-4 Caprate, Polyglycerin Caprate
Surfactant · Emulsifying · EWG: 1
Synthetic
Cleanser
Emulsifier
Clean
1,2,3-Propanetriol, homopolymer, decanoates (1:1) (4 mol glycerol average molar ratio)
CAS #
160391-93-5
Form
Liquid
See origin →
Functions
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Emulsifier
Anti-Aging Benefits
Mixes Oil & Water
Traditional Use
A modern synthetic emulsifier developed in the late 20th century as part of the polyglyceryl ester family. Created to replace harsher chemical emulsifiers while providing natural-origin appeal and gentler skin compatibility.
Skin Types
●all-skin-types, gentle
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
ewg-1
medical-approval
pregnancy-nursing-safe
all-shades-safe
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Verified Jun 2026
Data: CosIng · EWG · CIR