Methyl Octine Carbonate

What Methyl Octine Carbonate smells like

Methyl octine carbonate (methyl 2-nonynoate) is a green, violet-leaf material that is softer and more floral than methyl heptine carbonate. Givaudan describes the powerful yet subtle note of violet leaves with a fruity-vegetable cucumber undertone; Bedoukian gives green and violet leaf, and a strong but delicate violet-leaf and mimosa odour. The Good Scents Company lists floral, green, violet leaf, melon and cucumber.

Leading note

Violet leaf

Supporting facets

Cucumber, mimosa-like floral

Faint facets

Melon

Character

Green, delicate, soft, watery

• violet leaf
• green
• cucumber
• fatty

What makes Methyl Octine Carbonate distinctive

Delicacy. It keeps the violet-leaf greenness of methyl heptine carbonate but trades its raw vegetable power for a softer, floral, mimosa-like tone.

How Methyl Octine Carbonate is used

Used for violet-leaf, green and cucumber nuances in floral and fresh compositions, where a softer violet leaf is wanted than methyl heptine carbonate gives.

Typical role: modifier (used in small amounts to change the character of a blend).

How Methyl Octine Carbonate differs from similar materials

Methyl Heptine Carbonate

Methyl heptine carbonate is the more powerful, vegetal and hay-like violet leaf; methyl octine carbonate is softer, more floral and mimosa-like.

Violet Leaf Absolute

The absolute is the natural material — earthier, waxier and more complex, with cucumber and melon; methyl octine carbonate is a cleaner, more floral violet leaf.

Violettyne*

Firmenich offers Violettyne as a stable replacement for methyl octine carbonate, with a galbanum undertone and a cucumber aspect. (compared directly by a cited source)

An asterisk marks a difference that a cited source states directly. The others compare the published descriptions of each material. Smell varies with grade, supplier and dilution; compare them side by side on blotters before substituting one for another.

Formulation considerations

Very powerful. Check the IFRA status for your product category and use from dilution.

Identity and classification

Type

Aroma chemical

Origin

Synthetic

Odour family

Green / Aquatic

Note position

Top to heart note

Physical form at room temperature

Liquid

Also known as

Methyl 2-nonynoate, Methyl non-2-ynoate

CAS number

111-80-8

Molecular formula

C10H16O2

Molecular weight

168.23 g/mol

IUPAC name

methyl non-2-ynoate

The CAS number, formula and molecular weight are taken from PubChem compound 8137, whose own record lists this CAS number; checked 19 October 2026.

Safety and compliance

The IFRA Standards Library lists a Standard covering Methyl Octine Carbonate:

• "Methyl octine carbonate" — Restriction, 49th Amendment, published 2020-01

Limits differ by product category and are set out in the Standard itself; this page does not reproduce them. The list above reflects the library as read on 19 October 2026.

Hazard classification of the neat substance, as PubChem summarises it, read 26 October 2026. Companies notifying the ECHA C&L Inventory classify it (1,828 reports): H302 harmful if swallowed (99.6% of reports); H317 may cause an allergic skin reaction (97.8% of reports); H400 very toxic to aquatic life (74.9% of reports); H412 harmful to aquatic life with long lasting effects (74.9% of reports); H315 causes skin irritation (74.8% of reports). A skin sensitiser classification concerns handling the neat material and the dose in a finished product; the IFRA Standards, where they apply, set the limits. Unless it is harmonised, this is the notifiers' own classification, not a binding one.

This page is general information, not a safety assessment or a specification. Confirm identity, composition, IFRA status and allergen content from your supplier's documents for the lot you hold.

Materials it works with

• Methyl Heptine Carbonate

  Aroma chemical · Green / Aquatic — green, violet leaf, cucumber, fatty

• Violet Leaf Absolute

  Absolute · Green / Aquatic — green, leafy, cucumber, watery

• 2,6-Nonadienal

  Aroma chemical · Green / Aquatic — cucumber, green, violet leaf, watery

• alpha-Ionone

  Aroma chemical · Powdery / Fruity — violet, powdery, fruity, sweet

Methyl Octine Carbonate is also suggested as a partner on the pages for 2,6-Nonadienol, Datilat and Violettyne.

Used in formulas and accords

Used in 2 published formulas

Methyl Octine Carbonate is an ingredient in 2 accords in the Formula & Accord Library.

• Mango Accord

  Community Formula · Accord

• Strawberry Banana Milkshake Accord

  Community Formula · Accord

Further reading

• Green Notes in Perfumery: Leaf, Galbanum and Violet Leaf

  The green palette — cis-3-hexenol, galbanum, violet leaf, styrallyl acetate — what green notes do, dosage, restrictions and pairings.

Questions about Methyl Octine Carbonate

Sources

• PubChem — compound 8137, checked 19 October 2026.
• PubChem — GHS classification (the ECHA C&L Inventory notifications and any harmonised EU entry), read 26 October 2026.
• IFRA — Standards Library, read 19 October 2026.
• The Good Scents Company — methyl 2-nonynoate (with Givaudan and Bedoukian descriptions) — odour database.
• The Good Scents Company — violet leaf odour category — odour database.
• Parchem — methyl octine carbonate specification — distributor's description.
• Olfactory profile: the RUŌOD Lab team's synthesis of the published descriptions above, reviewed 25 October 2026. Evidence: more than one published description. Classification and the short description: revision 1. Descriptions of odour are judgement, not measurement.