Pentaerythrityl Tetra C5-9 Acid Esters

Pentaerythrityl Tetra C5-9 Acid Esters 1
AKA: Pentaerythritol Ester
Synthetic
Skin Conditioner
Hair Care
Acid
Not Clean
Carboxylic acids, C5-9, tetraesters with pentaerythritol
CAS #
67762-53-2
State
Solid
Functions
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Plasticiser
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Locks in moisture
Traditional Use
Synthetic esters developed in the 20th century from pentaerythritol and mixed branched fatty acids. Used in contemporary cosmetics as conditioning and texture-building agents.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR