murphyPentaerythrityl Tetracaprylate/Tetracaprate
AKA: Pentaerythritol tetracaprylate, Pentaerythrityl octanoate/decanoate
Synthetic
Emollient
Skin Conditioner
Clean
OriginSynthesized from pentaerythritol combined with caprylic and capric fatty acids derived from coconut or palm oils. Produced through esterification reaction between pentaerythritol and the fatty acid chains.
Decanoic acid, mixed esters with octanoic acid and pentaerythritol
CAS #
68441-68-9
Form
Liquid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Locks In Moisture
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 585)
Not a Sensitizer
1 study / 1 not sensitizing (CIR 585)
Concentration Guide
Leave-on0.07–5%
Rinse-offNot reported
0%50%100%
CIR reported use · report published 2015
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR