In short
Okoumal is a synthetic woody-amber material with a warm, slightly fruity character.
What Okoumal smells like
Okoumal (Givaudan) brings an attractive and elegant woody-ambery effect, with olfactive notes of amber, wood, tobacco and musk, in Givaudan's listing; it is extremely long-lasting, more than a month on a blotter. The Good Scents Company lists dry, amber, woody, powdery and musk; Fraterworks a dry, sophisticated woody amber with tobacco-leaf undertones, a soft musky vibration and a velvety texture.
- Leading note
- Dry woody amber
- Supporting facets
- Tobacco, snuff, musky
- Faint facets
- Powdery
- Character
- Dry, velvety, tenacious, elegant
What makes Okoumal distinctive
An elegant, velvety woody amber with snuff and a soft musk — very long-lasting.
How Okoumal is used
Used as a long-lasting woody-amber heart in woody, oriental and masculine compositions.
Typical role: fixative (slow to evaporate; helps a blend last and holds lighter notes).
How Okoumal differs from similar materials
- Kephalis
- Kephalis is warmer, with a green-herb side; Okoumal is drier and muskier, with snuff and a velvety texture.
- Cashmeran
- Cashmeran is spicier and fruitier, with pine; Okoumal is drier, with tobacco and amber.
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.
Formulation considerations
Stable in most bases.
Identity and classification
- Type
- Aroma chemical
- Origin
- Synthetic
- Odour family
- Amber / Woody
- Note position
- Base note
- Physical form at room temperature
- Liquid
- CAS number
- 131812-67-4
- Molecular formula
- C19H28O2
- Molecular weight
- 288.4 g/mol
- IUPAC name
- 2,4-dimethyl-2-(5,5,8,8-tetramethyl-6,7-dihydronaphthalen-2-yl)-1,3-dioxolane
The CAS number, formula and molecular weight are taken from PubChem compound 3034278, 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 (1,555 reports): H400 very toxic to aquatic life (100% of reports); H410 very toxic to aquatic life with long lasting effects (100% of 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
-
Iso E Super
Aroma chemical · Woody / Amber — woody, velvety, amber, cedar
-
Ambroxan
Aroma chemical · Amber / Woody — amber, ambergris, woody, mineral
-
Cashmeran
Aroma chemical · Woody / Musky — musky, woody, spicy, velvety
Used in formulas and accords
Used in 24 published formulas
Okoumal is an ingredient in 20 perfume formulas and 4 accords in the Formula & Accord Library.
Community formulas
RUŌOD House Originals
Original compositions by RUŌOD House.
Further reading
Questions about Okoumal
Is Okoumal natural or synthetic?
Okoumal is synthetic — it is made by chemical synthesis.
What is the CAS number of Okoumal?
131812-67-4. It was checked against PubChem on 19 October 2026.
Which published formulas use Okoumal?
Okoumal is used in 24 published formulas in the RUŌOD Lab Formula & Accord Library, including Agar Lantern, Black Pepper Sail and Blackcurrant Signal. Each is listed with a link under "Used in formulas and accords" on this page.
Sources
- PubChem — compound 3034278, checked 19 October 2026.
- PubChem — GHS classification (the ECHA C&L Inventory notifications and any harmonised EU entry), read 26 October 2026.
- Givaudan — Okoumal — manufacturer's description.
- The Good Scents Company — Okoumal — odour database.
- Fraterworks — Okoumal — distributor's description.
- Olfactory profile: the RUŌOD Lab team's synthesis of the published descriptions above, reviewed 21 October 2026. Evidence: more than one published description. Classification and the short description: revision 1. Descriptions of odour are judgement, not measurement.