Pentaerythrityl Tetra C5-9 Acid Esters
AKA “Pentaerythritol Ester”
Acid
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Ingredient Facts
Pentaerythrityl tetra c5-9 acid esters
AKA: Pentaerythritol Ester
Acid · Plasticiser · EWG: 4
Synthetic
Skin Conditioner
Hair Care
Acid
Not Clean
Carboxylic acids, C5-9, tetraesters with pentaerythritol
CAS #
67762-53-2
State
Solid
See origin →
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.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Verified Jun 2026
Data: CosIng · EWG · CIR