2,6-Nonadienol

In short

2,6-Nonadienol is the alcohol corresponding to nonadienal, the cucumber aldehyde. It has a green cucumber and violet-leaf odour that is softer and less fatty than the aldehyde.

What 2,6-Nonadienol smells like

2,6-Nonadienol is the alcohol counterpart of nonadienal: green, watery cucumber and melon with a violet-leaf character in dilution. Arctander describes it as extremely powerful and very diffusive, green-vegetable, and only in dilution strikingly reminiscent of cucumber or violet leaf. Bedoukian lists cucumber, melon or fresh leafy, violet-leaf odour in dilution. Givaudan, noting that it occurs in violet leaves and cucumber, describes it as olfactively similar to nonadienal but fruitier and less leafy, and more stable.

Leading note: Cucumber and melon
Clear facets: Violet leaf
Supporting facets: Green vegetable
Faint facets: Green apple
Character: Green, watery, diffusive, fresh

What makes 2,6-Nonadienol distinctive

It is the softer, fruitier side of the cucumber note: Givaudan places it beside nonadienal as fruitier and less leafy, and its stability means it works where the aldehyde would not last.

Concentration and dilution

Arctander stresses that only in dilution does its powerful green-vegetable odour become strikingly cucumber or violet leaf; suppliers recommend smelling it at 1% or less.

How 2,6-Nonadienol is used

Used for natural melon-cucumber notes across a wide range of products, for violet-leaf accords, and alongside nonadienal, which it extends into applications where the aldehyde is unstable.

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

How 2,6-Nonadienol differs from similar materials

2,6-Nonadienal: Givaudan describes the alcohol as fruitier and less leafy than the aldehyde, and more stable; the aldehyde is the more aggressive, fatty-green cucumber. (compared directly by a cited source)
cis-6-Nonenol: cis-6-Nonenol is sweeter honeydew melon with a waxy side; nonadienol is greener, cucumber and violet leaf first.

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; dose from a 0.1% or 1% dilution.

Identity and classification

Type: Aroma chemical
Origin: Occurs in nature
Odour family: Green / Fruity
Note position: Top to heart note
Physical form at room temperature: Liquid
Also known as: (2E,6Z)-Nona-2,6-dien-1-ol
CAS number: 7786-44-9
Molecular formula: C9H16O
Molecular weight: 140.22 g/mol
IUPAC name: nona-2,6-dien-1-ol

The CAS number, formula and molecular weight are taken from PubChem compound 34134, whose own record lists this CAS number; checked 19 October 2026.

Safety and compliance

Hazard classification of the neat substance, as PubChem summarises it, read 26 October 2026. Companies notifying the ECHA C&L Inventory report it as not meeting the GHS hazard criteria (1,423 of 1,424 reports). 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

2,6-Nonadienal
Aroma chemical · Green / Aquatic — cucumber, green, violet leaf, watery
Violet Leaf Absolute
Absolute · Green / Aquatic — green, leafy, cucumber, watery
Methyl Octine Carbonate
Aroma chemical · Green / Aquatic — violet leaf, green, cucumber, fatty
cis-6-Nonenol
Aroma chemical · Fruity / Green — melon, cucumber, green, waxy

Used in formulas and accords

Used in 2 published formulas

2,6-Nonadienol is an ingredient in 2 perfume formulas in the Formula & Accord Library.

RUŌOD House Originals

Original compositions by RUŌOD House.

Green Pod Theory
RUŌOD House Creation · listed as “2,6-Nonadienol 1% DPG”, at 1% in DPG
Honeydew Static
RUŌOD House Original · listed as “2,6-Nonadienol 1% DPG”, at 1% in DPG

Questions about 2,6-Nonadienol

Is 2,6-Nonadienol natural or synthetic?

The molecule occurs in nature. Commercial 2,6-Nonadienol may be made by synthesis or obtained from natural sources, so check the supplier's specification if the distinction matters to you.

What is the CAS number of 2,6-Nonadienol?

7786-44-9. It was checked against PubChem on 19 October 2026.

Which published formulas use 2,6-Nonadienol?

2,6-Nonadienol is used in 2 published formulas in the RUŌOD Lab Formula & Accord Library: Green Pod Theory and Honeydew Static. Each is listed with a link under "Used in formulas and accords" on this page.

Sources

PubChem — compound 34134, checked 19 October 2026.
PubChem — GHS classification (the ECHA C&L Inventory notifications and any harmonised EU entry), read 26 October 2026.
The Good Scents Company — trans,cis-2,6-nonadienol (with Bedoukian, Givaudan and Arctander) — odour database.
S. Arctander, Perfume and Flavor Chemicals (1969), as quoted by The Good Scents Company — published perfumery reference.
Sigma-Aldrich — trans,cis-2,6-nonadien-1-ol, organoleptic profile — manufacturer's description.
Fraterworks — trans-2-cis-6-nonadienol — distributor's description.
Olfactory profile: the RUŌOD Lab team's synthesis of the published descriptions above, reviewed 20 October 2026. Evidence: several independent published descriptions, which agree. Classification and the short description: revision 1. Descriptions of odour are judgement, not measurement.