Methyleugenol (phenylpropane) assay

Methyleugenol (CAS No. 93-15-2) is a naturally occurring organic compound belonging to the phenylpropane . It is present in varying concentrations in many essential oils (basil, lemongrass, clove, bay leaf, rose, anise, etc.).
recognized for its aromatic and fixative properties , it is regulated due to its allergenic and genotoxic potential .

measuring methyleugenol levels is essential for:

• To monitor the regulatory compliance of products containing plant extracts.
• Monitor residual levels in cosmetic or nutraceutical formulations.
• Ensure labelling security in accordance with Regulation (EC) No 1223/2009 on cosmetic products and the CLP Regulation (Classification, Labelling, Packaging).

Analytical methods used

The analysis of methyleugenol relies on high-precision chromatographic techniques, allowing the molecule to be separated and quantified in complex matrices:

• GC-MS (Gas Chromatography coupled with mass spectrometry) : reference method for the specific detection and structural confirmation of methyleugenol.
• GC-FID (Gas Chromatography with Flame Ionization Detection) : used for the precise quantification of the compound in essential oils or aromatic extracts.

These techniques ensure high sensitivity (detection limits on the order of µg/kg) and efficient separation of neighboring compounds (eugenol, isoeugenol, safrole).

The analysis complies with ISO 11024-1 and ISO 11024-2 , as well as the guidelines of Regulation (EC) No 1223/2009 concerning the declaration of allergenic perfume substances.

Matrices involved

The assay of methyleugenol is applicable to various matrices derived from cosmetics, herbal medicine, or nutrition:

• Essential oils (basil, lemongrass, clove, bay leaf, rose, tarragon…).
• Plant extracts used in food supplements and nutraceutical products.
• Finished cosmetic products : perfumes, creams, lotions, soaps, massage oils.
• Natural flavorings and formulations intended for human consumption.

Industrial and regulatory applications

Methyleugenol analysis is crucial to ensure:

• The safety of cosmetic and aromatic products , by limiting consumer exposure.
• Traceability of essential oils in natural supply chains.
• Regulatory compliance with European Directive 2003/15/EC and the REACH regulation concerning substances with toxic potential.

The results obtained make it possible to determine whether the products comply with the limit values ​​set for methyleugenol in cosmetic and food formulations, and to adjust the concentrations if necessary.

This analysis can be supplemented by:

• The dosage of eugenol , another phenylpropane frequently present in essential oils.
• The dosage of isoeugenol is also subject to restriction.
• The dosage of safrole , an aromatic compound classified as a CMR substance.

Interpretation of the results

The results of the methyleugenol assay are expressed in mg/kg or as a percentage (w/w) depending on the matrix.
They allow us to:

• Verify compliance with European regulatory thresholds .
• Identify sources of exposure in complex formulations.
• Ensuring the safety and transparency of labeling for natural or processed products.

The analysis reports include GC-MS chromatograms and mass spectra, allowing unambiguous confirmation of the presence of methyleugenol.

YesWeLab's expertise

YesWeLab provides a network of partner laboratories accredited to ISO 17025 and COFRAC , experts in chromatographic analysis of volatile compounds .

Thanks to the YesWeLab digital platform , you can order your analyses, track your samples and view your results online in a centralized and rapid manner.

For any specific request, contact our scientific team to determine the most suitable method for your matrix and regulatory obligations.