Polyglyceryl-4 Caprate

Polyglyceryl-4 Caprate 1
photograph
Polyglyceryl-4 Caprate 2
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AKA: PEG-4 Caprate, Polyglycerin Caprate
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Synthetic
Cleanser
Emulsifier
Clean
OriginSynthesized from polyglycerin and capric acid (a saturated fatty acid), both derived from vegetable oils or synthetic sources. Produced through esterification, where polyglycerin reacts with capric acid under controlled conditions to form the ester compound.
1,2,3-Propanetriol, homopolymer, decanoates (1:1) (4 mol glycerol average molar ratio)
CAS #
160391-93-5
Form
Liquid
Skin Types
●all-skin-types, gentle
Best For
General
Pregnancy & Breastfeeding Safe
Yes
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
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.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Skin Irritant
1 study / 1 not irritating (CIR 717)
Not a Sensitizer
1 study / 1 not sensitizing (CIR 717)
Not an Eye Irritant
1 study / 1 not irritating (CIR 717)
Concentration Guide
Leave-on0.5–1.5%
Rinse-off0.9–1.5%
0%50%100%
CIR reported use · report published 2023
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR