Science
Mechanism of Action
It functions as a pH-dependent preservative; in slightly acidic environments, it transforms into undissociated sorbic acid which penetrates microbial cell walls. Once internalized, it disrupts the cell's metabolic enzymes and oxidative phosphorylation, effectively neutralizing microbial activity without impacting human skin cells.
Research
Clinical Evidence
High confidence0.6%
Key findings
- 01 Confirmed as non-sensitizing and non-irritating to the general population, though transient redness may occur in hyper-sensitive individuals.
- 02 Even at concentrations far exceeding commercial use, only minimal, temporary ocular irritation was observed with no significant dermal impact.
Transparency
Dusting Analysis
As a preservative, it is required in low concentrations (typically 0.2%–0.6%) to be effective. It is rarely 'dusted' because its presence is functional for safety rather than marketing claims.
The Formula
Formulation
Stability
Highly thermally stable with a decomposition point of 268°C, making it superior to sorbic acid for various manufacturing processes. Activity diminishes significantly if the formula pH exceeds 6.5.
Synergies
- Chelating agents
- Organic acids
Conflicts
- Non-ionic surfactants (Polysorbates)
- Strong oxidizing agents
- Alkaline environments (pH > 7.0)
Safety
Safety Profile
While discontinued as a food additive in the EU due to dietary-specific data gaps, it remains globally approved and verified as safe for topical cosmetic application.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A reliable and thermally stable preservative that ensures formula longevity and safety in acidic to neutral skincare products.
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References
Sources