Polyglyceryl-4 Caprate
AKA: PEG-4 Caprate, Polyglycerin Caprate
Synthetic
Cleanser
Emulsifier
Clean
1,2,3-Propanetriol, homopolymer, decanoates (1:1) (4 mol glycerol average molar ratio)
CAS #
160391-93-5
Form
Liquid
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.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
ewg-1
medical-approval
pregnancy-nursing-safe
all-shades-safe
Regulatory Agencies
Skin Types
●all-skin-types, gentle
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Black Tulip Facial Treatment
Bloom Effects
Smooth + Sculpt Set
Grown Alchemist
Everyday Radiance Essentials
Bloom Effects
Secure Brow Shape + Hold Clear Brow Gel
LYS Beauty
Radiance Reset
Bloom Effects
Cashmere Matte Eyelights
RMS Beauty
Eyelights Cream Eyeshadow
RMS Beauty
Legendary Serum Lipstick
RMS Beauty
Legendary Serum Lipstick: The Nudes
RMS Beauty
Skin Renewal Serum (25mL)
Grown Alchemist
[Travel Size] Skin Renewal Serum (5mL)
Grown Alchemist
Pore Perfecting Liquid
Alpyn Beauty
Bye-Bye Redness Regimen
Indie Lee
Sensitive Skin Regimen
Indie Lee
Soothing Cleanser
Indie Lee
Plump + Juicy Vegan Collagen Spray-On Serum
Kosas
Forest Fix Spray Deodorant
Ursa Major
Tulip Dew Drops
Bloom Effects
Sun Tone Bronzing Drops - Soleil Parfait 1
Westman Atelier
Sun Tone Bronzing Drops
Westman Atelier
Sun Tone Bronzing Drops - Soleil Parfait 3
Westman Atelier
Sun Tone Bronzing Drops - Soleil Parfait 4
Westman Atelier
Verified Jun 2026
Data: CosIng · EWG · CIR