In short
Rhubofix is dsm-firmenich's woody rhubarb material: a green-floral rhubarb effect over a dry, vetiver-like wood. It is the woody, lasting member of Firmenich's rhubarb family.
What Rhubofix smells like
dsm-firmenich classes Rhubofix as woody and describes a prominent floral green rhubarb effect with a grapefruit undertone and a vetiver-like side. The Good Scents Company calls it a complex woody, spicy, floral and fruity note with a green rhubarb effect. Fraterworks finds a dry woody core with vetiver-like facets and spicy warmth, the woody counterpart of the floral Rhuboflor.
- Leading note
- Rhubarb
- Clear facets
- Woody
- Supporting facets
- Vetiver, grapefruit
- Faint facets
- Spicy
- Character
- Dry, fresh
What makes Rhubofix distinctive
Rhubarb anchored in wood: the green stalk note over a dry vetiver-like base.
Where the descriptions disagree: Sources weigh the woody-vetiver side against the floral-fruity rhubarb differently.
How Rhubofix is used
Used for a woody rhubarb effect in heart and base, from traces up to about 10%.
Typical role: modifier (used in small amounts to change the character of a blend).
How Rhubofix differs from similar materials
- Symroxane
- Symroxane is a vetiver-like wood with dried fruit and tobacco; Rhubofix sets a green rhubarb and grapefruit top over its dry, vetiver-like wood.
- Vetikol Acetate
- Vetikol acetate is a vetiver impression with grapefruit and rhubarb facets; Rhubofix leads with rhubarb, over a dry wood.
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
- Woody / Green
- Note position
- Heart to base note
- Physical form at room temperature
- Liquid
- CAS number
- 41816-03-9
- Molecular formula
- C14H20O
- Molecular weight
- 204.31 g/mol
- IUPAC name
- 3,4'-dimethylspiro[oxirane-2,10'-tricyclo[6.2.1.02,7]undec-4-ene]
The CAS number, formula and molecular weight are taken from PubChem compound 94522, whose own record lists this CAS number; checked 24 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 (267 of 280 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
-
Vetiver Oil
Essential oil · Woody / Green — earthy, smoky, woody, rooty
-
Grapefruit Oil (Expressed)
Essential oil · Citrus / Fruity — citrus, bitter, juicy, sparkling
-
Iso E Super
Aroma chemical · Woody / Amber — woody, velvety, amber, cedar
Used in formulas and accords
Used in 4 published formulas
Rhubofix is an ingredient in 2 perfume formulas and 2 accords in the Formula & Accord Library.
Community formulas
RUŌOD House Originals
Original compositions by RUŌOD House.
Further reading
Questions about Rhubofix
Is Rhubofix natural or synthetic?
Rhubofix is synthetic — it is made by chemical synthesis.
What is the CAS number of Rhubofix?
41816-03-9. It was checked against PubChem on 24 October 2026.
Which published formulas use Rhubofix?
Rhubofix is used in 4 published formulas in the RUŌOD Lab Formula & Accord Library, including Aperol Spritz Accord, Pith & Pepper and Rhubarb Accord. Each is listed with a link under "Used in formulas and accords" on this page.
Sources
- PubChem — compound 94522, checked 24 October 2026.
- PubChem — GHS classification (the ECHA C&L Inventory notifications and any harmonised EU entry), read 26 October 2026.
- dsm-firmenich — Rhubofix — manufacturer's description.
- The Good Scents Company — Rhubofix — odour database.
- Fraterworks — Rhubofix — 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.