In short
Undecavertol is a trade name for 4-methyldec-3-en-5-ol, an unsaturated alcohol with a fresh green, violet-leaf odour. It is a milder, more floral alternative to the very sharp violet-leaf materials.
What Undecavertol smells like
Undecavertol (Givaudan) is a violet-leaf material with a piercing green odour. The one detailed description found, from a distributor, calls it a violet-leaf note with fantasy aspects to its piercing green character, very powerful and best used in traces. Givaudan's own technical description was not found, so the detail of its profile rests on that single account. Fraterworks, naming Givaudan as the maker, describes a powerful green-floral character with violet-leaf nuances and fresh fruity aspects of kiwi, fig and pear, imparting juiciness and watery freshness to green and fruity accords; it notes that it has less power than violet leaf, and that used as a replacer for the methyl heptine and octine carbonates it needs a larger dose.
- Leading note
- Violet leaf
- Clear facets
- Piercing green
- Character
- Green, piercing, powerful
What makes Undecavertol distinctive
A violet-leaf green that distributors describe as more abstract — a fantasy violet leaf — than the natural-smelling greens, and very powerful.
Concentration and dilution
Very powerful; usually used in traces.
How Undecavertol is used
Used in traces for violet-leaf and green effects; one distributor cites an abstract rose accord as an example of its use.
Typical role: modifier (used in small amounts to change the character of a blend).
How Undecavertol differs from similar materials
- Liffarome
- Liffarome is softer and fruitier, with pear; Undecavertol is a piercing, very powerful violet-leaf green.
Each difference compares the published descriptions of the two materials. Smell varies with grade, supplier and dilution; compare them side by side on blotters before substituting one for another.
Identity and classification
- Type
- Aroma chemical
- Origin
- Synthetic
- Odour family
- Green / Floral
- Note position
- Top to heart note
- Physical form at room temperature
- Liquid
- Also known as
- 4-Methyldec-3-en-5-ol
- CAS number
- 81782-77-6
- Molecular formula
- C11H22O
- Molecular weight
- 170.29 g/mol
- IUPAC name
- 4-methyldec-3-en-5-ol
The CAS number, formula and molecular weight are taken from PubChem compound 163336, 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 classify it (1,777 reports): H400 very toxic to aquatic life (89.1% of reports). 191 of the reports find it does not meet the hazard criteria. 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
-
alpha-Ionone
Aroma chemical · Powdery / Fruity — violet, powdery, fruity, sweet
-
Dihydromyrcenol
Aroma chemical · Citrus / Aromatic — citrus, lime, fresh, clean
Used in formulas and accords
Used in 6 published formulas
Undecavertol is an ingredient in 1 perfume formula, 4 accords and 1 base in the Formula & Accord Library.
Community formulas
RUŌOD House Originals
Original compositions by RUŌOD House.
Further reading
Questions about Undecavertol
Is Undecavertol natural or synthetic?
Undecavertol is synthetic — it is made by chemical synthesis.
What is the CAS number of Undecavertol?
81782-77-6. It was checked against PubChem on 19 October 2026.
Which published formulas use Undecavertol?
Undecavertol is used in 6 published formulas in the RUŌOD Lab Formula & Accord Library, including Cranberry Base, Dragon Fruit Accord and Gasoline Accord. Each is listed with a link under "Used in formulas and accords" on this page.
Sources
- PubChem — compound 163336, checked 19 October 2026.
- PubChem — GHS classification (the ECHA C&L Inventory notifications and any harmonised EU entry), read 26 October 2026.
- The Fragrance Foundry — Undecavertol (Givaudan) — distributor's description.
- Fraterworks — Undecavertol — distributor's description.
- Olfactory profile: the RUŌOD Lab team's synthesis of the published descriptions above, reviewed 26 October 2026. Evidence: more than one published description. Classification and the short description: revision 1. Descriptions of odour are judgement, not measurement.