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Ingredient directory

Undecylenamidopropyl Betaine

Undecylenamidopropyl Betaine is a zwitterionic surfactant prized for its cleansing, conditioning, and foam-boosting properties. It efficiently removes impurities while supporting skin's natural moisture balance, leaving it soft and supple.

Directory entry · Individual source review pending

This profile is awaiting an individual source review. Treat its ratings, dose estimates and compatibility labels as provisional; they are not medical advice or proof of a finished product’s effects.

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Science

This zwitterionic surfactant reduces surface tension, enabling effective cleansing and emulsification. Its betaine derivative component, an osmolyte, supports cell-water balance and strengthens the skin barrier, contributing to its skin conditioning effects.


Research

Medium confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 At 0.1% concentration, it mildly inhibits biofilm formation of *S. aureus* and *C. albicans*, and enhances PHMB's anti-biofilm effect on *P. aeruginosa*.

Transparency

Not commonly dusted

The Formula

Solubility
Water
Optimal pH 2.8 – 8.5
0 7 14

Stability

Exhibits good stability as a zwitterion over a broad pH range (2.8-8.5), specifically buffering at pH 5.5. Formulations require protection from heat and moisture for optimal longevity.

Synergies

  • Polyhexamethylene Biguanide (PHMB) for enhanced anti-biofilm efficacy

Safety

CIR Status
Safe with restrictions
Sensitization risk Low

The CIR Expert Panel deems it safe when formulated to be non-sensitizing. While product concentrations range from 0.2% to 7.5%, a universal maximum safe concentration is not explicitly defined, with safety contingent on proper formulation.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

A valuable zwitterionic surfactant offering effective cleansing, conditioning, and foam boosting, suitable for all skin types due to its low irritancy and comedogenicity when properly formulated.


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