Fragrance allergens / Methyl 2-Octynoate

Methyl 2-Octynoate

Methyl 2-Octynoate must be declared in the EU, Northern Ireland and Great Britain once it crosses the threshold.

Identity

Name in the ingredient list	Methyl 2-Octynoate
CAS / EC number	111-12-6 / EC 203-836-6
EU Annex III entry	89
GB Annex III entry	89

It is one of the long-standing entries, carried unchanged through the 2023 expansion.

When it must appear on the label

Methyl 2-Octynoate may be present as a constituent of essential oils or fragrance compounds. It must be named individually in the ingredient list when its total concentration in the finished product exceeds 0.001% in leave-on products (lotions, balms) or 0.01% in rinse-off products (soap, shower gel), summed across every fragrance source in the recipe. Below the threshold it stays within the collective term "Parfum".

United States: no individual fragrance-allergen labelling is in force yet (MoCRA rulemaking pending); fragrance is declared collectively as "Fragrance".

Common questions

Do I have to list Methyl 2-Octynoate on my label?

Methyl 2-Octynoate must be declared in the EU, Northern Ireland and Great Britain once it crosses the threshold. It must be named individually once it exceeds 0.001% of a leave-on product or 0.01% of a rinse-off product, summed across every fragrance source in the recipe. Below that it stays inside the collective term "Parfum".

What is the CAS number for Methyl 2-Octynoate?

Methyl 2-Octynoate is listed under CAS 111-12-6 (EC 203-836-6), Annex III entry 89.

Sources

Regulation (EC) No 1223/2009, Annex III (consolidated text of 01.05.2026), entries 67 to 92 (EUR-Lex)
Assimilated Regulation (EC) No 1223/2009, Annex III, as it applies in Great Britain, entries carrying the individual-declaration condition (legislation.gov.uk)

Transcribed from the official texts linked above and source-audited against them; a labelling reference, not safety advice. You remain responsible for your product's compliance.

Rule tables last checked 21 August 2026.