Is methyl 2-octynoate a fragrance allergen?

Yes, methyl 2-octynoate is listed as a fragrance allergen in the EU and requires a label disclosure above certain use levels. Most people tolerate it without reaction, but those with a known sensitivity to this fragrance component should avoid it.

Does methyl 2-octynoate cause sensitization in most people?

No. Reported sensitization is uncommon and typically occurs at higher concentrations than are found in most finished cosmetic products. The EU recognizes it as an allergen requiring labeling, but adverse reactions in real-world use are rare.

fragrance

Methyl 2-Octynoate

Watch if sensitive·Limited evidence

Methyl 2-octynoate is a violet-leaf fragrance ingredient included on the EU allergen disclosure list. Reported sensitization is uncommon and typically occurs at higher use concentrations than are found in most finished products.

Worth knowing

EU-labelled fragrance allergen
Known contact sensitizer for some
Restricted in the EU

EU named-label disclosure required above 0.001% leave-on / 0.01% rinse-off.

Questions

Is methyl 2-octynoate a fragrance allergen?: Yes, methyl 2-octynoate is listed as a fragrance allergen in the EU and requires a label disclosure above certain use levels. Most people tolerate it without reaction, but those with a known sensitivity to this fragrance component should avoid it.
Does methyl 2-octynoate cause sensitization in most people?: No. Reported sensitization is uncommon and typically occurs at higher concentrations than are found in most finished cosmetic products. The EU recognizes it as an allergen requiring labeling, but adverse reactions in real-world use are rare.

Products with Methyl 2-Octynoate

References

Cosmetic information for general education, not medical advice. A verdict is a reading of the published evidence, never a guarantee for your skin: any ingredient can irritate someone, so patch test new products and see a professional if you react. Concern is graded on cited evidence, never on hazard-score lists. See how we score.