Pentaerythrityl Rosinate
AKA “UNII-R9I304G139, EINECS 232-479-9, EC 232-479-9, DUTZBUOZKIIFTG-FXXYKOEOSA-N”
Emollient
Ingredient Facts
Pentaerythrityl rosinate
AKA: UNII-R9I304G139, EINECS 232-479-9, EC 232-479-9, DUTZBUOZKIIFTG-FXXYKOEOSA-N
Emollient · Emollient · EWG: 1
Synthetic
Emollient
Skin Conditioner
Clean
Pentaerythrityl Rosinates is the mixture of esters of Rosin and Pentaerythritol.
Formula
C25H40O5
Mol. Weight
420.60
CAS #
8050-26-8
See origin →
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Viscosity Controlling
Locks In Moisture
Traditional Use
A synthetic ester combining pentaerythritol with rosin, developed in the mid-20th century as a cosmetic film-former and binder with no traditional historical precedent.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Amended Final Report on the Safety Assessment of Pentaerythrityl Rosinate
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Pentaerythrityl Rosinate
European Commission
EU Cosmetic Ingredient Database (CosIng)
Pentaerythrityl Rosinate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR