Science
Mechanism of Action
As a cationic surfactant, Cetearalkonium Bromide carries a permanent positive charge that naturally attracts to the negatively charged proteins on the surface of skin and hair. Once adsorbed, it creates a uniform film that neutralizes static and provides a velvety texture; simultaneously, its amphiphilic molecular structure disrupts microbial lipid membranes to provide effective preservation.
Research
Clinical Evidence
High confidence0.1%
Key findings
- 01 Identified as the optimal concentration for achieving antimicrobial efficacy while remaining below the irritation threshold for human dermal contact.
- 02 Proven safe for providing significant antistatic and conditioning benefits in rinse-off applications without systemic absorption.
Transparency
Dusting Analysis
Because this ingredient is regulated as a preservative at 0.1%, it is rarely 'dusted.' However, if used as a primary conditioner in leave-on skin products at levels significantly below 0.1%, it may not provide functional benefit.
The Formula
Formulation
Stability
Maintains stability in acidic to neutral environments; most effective when formulated to align with the skin's natural pH.
Synergies
- Non-ionic surfactants
- Cationic conditioning agents
Conflicts
- Anionic surfactants (SLS/SLES)
- Anionic rheology modifiers (Carbomer, Xanthan Gum)
- Strong oxidizing agents
Safety
Safety Profile
While the 2025 CIR IDA requests further impurity data, it is currently restricted in the EU to 0.1% for leave-on/preservative use and 3% for rinse-off hair care.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A highly effective dual-action ingredient that excels in antimicrobial stabilization and surface conditioning, though it requires precise formulation to avoid anionic conflicts.
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References
Sources