INCI name

METHYL 2-OCTYNOATE

Methyl 2-octynoate (methyl heptine carbonate)

Perfumingreviewed

A synthetic fragrance ester regulated in Annex III.

What it is

Methyl 2-octynoate is methyl oct-2-ynoate, also known as methyl heptine carbonate, an ester with a carbon–carbon triple bond. CosIng lists it as a perfuming ingredient. In the EU it is covered by an entry in Annex III (substances subject to restrictions), which distinguishes oral products from other products.

Where it is used

Found in a small number of scented products.

Limits of interpretation

The INCI list shows which ingredients are present, not how much of each. Above 1%, ingredients are listed in descending order of weight; below 1% the order is free.

See the EU regulation section for the applicable limits and conditions. Fragrance ingredients often appear on the label only as "parfum", so its presence is not always named separately.

Functions

Perfuming
Used for perfume and aromatic raw materials.

EU regulation

EU · Annex III, entry 89Methyl 2-Octynoate
Product type
(a) Oral products (b) Other products
Maximum concentration
(b) 0.01% when used alone When present in combination with methyl octine carbonate, the combined level in the finished product shall not exceed 0,01 % (of which methyl octine carbonate shall not be more than 0,002 %)
As of
3 November 2026 · (EC) 2013/344

Products with this ingredient (19)

Check a full ingredient list