Common Name(s): Pentaerythrityl tetraundecylenate,pentaerythritol undecylenic acid (c11:1 antimicrobial, tetraester) ester
DESCRIPTION
What It Does: Softens and conditions skin with a light, non-greasy feel.
Why It's Used: Used for its tetraester with antifungal undecylenic acid on all 4 arms; film former with inherent antifungal character emollient properties; suitable for lightweight skin care where non-greasy texture is key.
How It Works: Ester of pentaerythritol (branched or specialty alcohol) with undecylenic acid (c11:1 antimicrobial, tetraester); branching reduces crystallinity and greasiness; provides smooth, dry-oil skin feel.
Typically Found In: Lightweight moisturizers,sunscreens,skin serums,body lotions
TECHNICAL DETAILS
Primary Category: Functional ingredient โ emollient
Secondary Functions: Skin conditioning,texture modification,spreading agent
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.5%โ10%
SOURCING & ETHICS
Vegan Status: Yes
Halal Status: Yes
Source Notes: Pentaerythritol and undecylenic acid (c11:1 antimicrobial, tetraester); plant or synthetic origin.
SKIN COMPATIBILITY
Irritancy Rating: 1/5 โ very low
Comedogenicity Rating: 1/5 โ low
Sensitivity Concerns: Generally well tolerated.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Good safety profile. ewg score: 1.
Works Well With: Other emollients,silicones,natural oils,humectants
Avoid Combining With: No significant incompatibilities
SCIENTIFIC NOTE
Pentaerythrityl tetraundecylenate: all 4 pentaerythritol arms esterified with undecylenic acid (from castor oil, antifungal c11:1); provides film-forming emolliency with inherent antifungal activity throughout the molecular structure.
Last Verified: 2026-03-28
Primary Sources: Cosing database,inci dictionary