Science
Mechanism of Action
Penetrates microbial cell walls and disrupts cytoplasmic membranes by increasing proton permeability, dissipating the proton motive force required for cellular energy production and ultimately causing cell death through leakage of intracellular contents
Research
Clinical Evidence
Medium confidence0.25%
Key findings
- 01 EPA documentation shows 0.1-0.4% provides effective antimicrobial activity in cosmetic formulations
- 02 UK regulatory data indicates 1.0% concentration effective for topical infections but associated with photoallergic reactions
Transparency
Dusting Analysis
Rarely used in modern cosmetics due to photoallergenic potential; any presence above 0.05% suggests intentional antimicrobial inclusion rather than trace contamination
The Formula
Formulation
Stability
Maintains structural integrity as solid but undergoes photodegradation with yellowing in solution when light-exposed; maximum antimicrobial efficacy achieved below pH 7.9 in un-ionized state
Conflicts
- Anionic surfactants and emulsifiers
- Oxidizing preservatives
- Acidic actives
- Formaldehyde donors
- Retinoid formulations
Safety
Safety Profile
Classified as known photoallergen in dermatological testing; highly restricted in cosmetic applications with regulatory preference for safer alternative preservatives
Our Assessment
Verdict
Effective antimicrobial agent with unacceptable photoallergenic risk profile for modern precision skincare formulations.
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References
Sources