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UNDECETH-11.

Questionable / SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

UNDECETH-11 is a polyethylene glycol (PEG) ether of undecyl alcohol, serving as a versatile cosmetic ingredient. It functions primarily as an emollient to soften and smooth the skin, while also acting as an emulsifier to stabilize oil and water mixtures and a surfactant to aid in cleansing.

Emollient Emulsifying Skin Conditioning Surfactant Cleansing

Science

On a molecular level, UNDECETH-11 acts as a skin conditioning agent, enhancing epidermal smoothness and suppleness through its emollient properties. As a surfactant, it reduces the surface tension within cosmetic formulations, facilitating the dispersion and removal of impurities during cleansing. Its role as an emulsifying agent involves modifying interfacial tension to create and maintain stable, homogeneous blends of immiscible liquid phases.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Both
Optimal pH N/A
0 7 14

Stability

This ingredient contributes to product stability by assisting in the uniform dispersion and blending of diverse formula components. As a member of the polyethylene glycol (PEG) family, its water solubility generally decreases proportionally with an increase in molar mass.


Safety

CIR Status
Safe with restrictions
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) has determined UNDECETH-11 to be safe for use in cosmetic formulations, subject to specific concentration and application limitations. However, potential contamination by manufacturing impurities such as ethylene oxide and 1,4-dioxane has led to warnings and use restrictions for EWG VERIFIED products. Neither the Scientific Committee on Consumer Safety (SCCS) nor the FDA has issued a specific safety opinion or status for UNDECETH-11.


Your Skin

No Normal
No Dry
No Oily
No Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Questionable

While UNDECETH-11 offers multi-functional utility in formulation, its use in precision skincare is questionable due to potential contamination concerns from toxic impurities and the absence of specific clinical efficacy data for direct skin benefits.


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