Science
Mechanism of Action
Classified as a gamma-lactone and fatty ester, gamma-caprolactone lacks identified beneficial mechanisms of action for direct skin application in cosmetic contexts. While structurally related alpha-methylene-gamma-butyrolactones are known to induce skin sensitization through Michael addition to proteins, this specific mechanism has not been attributed to gamma-caprolactone.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
This ingredient is not commonly 'dusted' or over-hyped in skincare for unsubstantiated claims.
The Formula
Formulation
Stability
Gamma-caprolactone exhibits practical insolubility in water, yet is readily miscible with many organic solvents, including 95% ethanol. Optimal pH range for cosmetic formulation stability is not specified, though general formulation principles necessitate pH control.
Conflicts
- oxidizing agents (e.g., nitrates, oxidizing acids, chlorine bleaches)
- strong bases
Safety
Safety Profile
Gamma-caprolactone has not undergone specific review by the Cosmetic Ingredient Review (CIR) Expert Panel or the Scientific Committee on Consumer Safety (SCCS) for cosmetic applications. It is classified as a hazardous substance by OSHA. Direct contact can lead to eye irritation and potential damage. Skin exposure may result in mild yet significant inflammation, with repeated contact potentially causing contact dermatitis. A rabbit skin test demonstrated mild irritation at 500 mg/24h. The FDA recognizes it as a flavoring agent or adjuvant and an inert ingredient in non-food pesticide products, while the EUCOSMETICS inventory categorizes it as a solvent.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Due to a complete absence of identified skin benefits and notable safety concerns including irritation and potential sensitization, gamma-caprolactone is not recommended for precision skincare formulations.
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References
Sources