Pentaerythritol Rosinate
AKA “Pentek, Tetramethylolmethane, Auxinutril, Maxinutril”
Ingredient
Ingredient Facts
Pentaerythritol rosinate
AKA: Pentek, Tetramethylolmethane, Auxinutril, Maxinutril
Ingredient · Humectant · EWG: 4
Synthetic
Humectant
Not Clean
Pentaerythritol Rosinate is a cosmetic ingredient. Assessed as safe by the CIR.
Formula
C5H12O4
Mol. Weight
136.15
CAS #
115-77-5
See origin →
Functions
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
Draws In Moisture
Conditions Skin
Anti-Aging Benefits
Antioxidant Protection
Draws moisture to skin
Traditional Use
A synthetic ester developed in the 20th century from the combination of pentaerythritol and rosin (a tree resin byproduct). Used in cosmetics as a film-former and texture modifier with no traditional use.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Final Report on the Safety Assessment of Pentaerythritol Rosinate (Amended report IJT 17(S4) 1998)
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Allergic contact cheilitis from pentaerythritol rosinate in a lipstick.
Ichihashi K, Soga F, Katoh N, Kishimoto S
Contact dermatitis, 2003
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR