Science
Mechanism of Action
As a fragrance aldehyde, Methoxycitronellal imparts a distinct fresh, floral, and melon-like scent. Its mechanism for skin sensitization involves directly reacting with and binding to skin proteins, which can potentially trigger an immune response and lead to allergic contact dermatitis in susceptible individuals.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 A RIFM Fragrance Material Safety Assessment classified Methoxycitronellal as a skin sensitizer.
- 02 Studies by Nakayama et al. documented positive patch test reactions (12 strong, 10 weak) in human subjects, noting potential cross-reactivity with hydroxycitronellal.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
This aldehyde compound should be stored in tightly sealed containers in a cool, dry, and ventilated environment, away from strong light to maintain stability. Aldehydes are generally prone to stability issues, though related compounds like hydroxycitronellal can be stabilized by forming hemi-acetals with their corresponding alcohols.
Safety
Safety Profile
Methoxycitronellal is categorized as a skin sensitizer by the Research Institute for Fragrance Materials (RIFM) and listed as a fragrance allergen by the SCCS. A No Expected Sensitization Induction Level (NESIL) of 5900 μg/cm2 has been identified. Its use is approved by the FDA Global Substance Registration System (GSRS) exclusively as a fragrance ingredient. Recommended usage levels, such as IFRA's suggestion of up to 10% in the fragrance concentrate, are highly dependent on the specific product category and are determined by systemic toxicity and skin sensitization endpoints.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Methoxycitronellal is a recognized fragrance allergen with a high risk of inducing skin sensitization, rendering it unsuitable for precision skincare formulations.
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References
Sources