Rhumacetal

What Rhumacetal smells like

JECFA, as published by PubChem, describes 1,1-diethoxycyclohexane as a colourless to pale yellow liquid with a fruity, liquor, rum, tobacco and woody aroma. Fraterworks describes Rhumacetal as an unmistakable boozy rum character — refined alcohol warmth without harsh solvent notes — with a dry, slightly smoky tobacco facet and woody undertones evoking aged oak barrels.

Leading note

Rum

Supporting facets

Tobacco, woody

Faint facets

Fruity

Character

Boozy, warm

• rum
• boozy
• fruity
• tobacco
• woody

What makes Rhumacetal distinctive

Boozy rum without harsh solvent notes, with a dry tobacco and oak-barrel side.

How Rhumacetal is used

Used to build rum and spirit accords, and for an aged, boozy warmth in tobacco and oriental compositions.

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

How Rhumacetal differs from similar materials

Rum Ether

Rum ether is the sharp, smoky, acidic side of a dark spirit; Rhumacetal is a smoother boozy rum without harsh solvent notes, with dry tobacco and oak.

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

Can seem underwhelming beside very powerful materials, according to Fraterworks.

Identity and classification

Type

Aroma chemical

Origin

Synthetic

Odour family

Gourmand / Woody

Note position

Top note

Physical form at room temperature

Liquid

Also known as

1,1-Diethoxycyclohexane, Cyclohexanone diethyl ketal

CAS number

1670-47-9

Molecular formula

C10H20O2

Molecular weight

172.26 g/mol

IUPAC name

1,1-diethoxycyclohexane

The CAS number, formula and molecular weight are taken from PubChem compound 74279, whose own record lists this CAS number; checked 25 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 (1,454 reports): H412 harmful to aquatic life with long lasting effects (88.5% of reports). 110 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

• Rum CO2 Extract

  CO2 extract · Gourmand / Fruity — rum, boozy, burnt sugar, alcoholic

• Vanillin

  Aroma chemical · Gourmand / Amber — vanilla, sweet, creamy

• Oakwood CO2 Extract

  CO2 extract · Woody / Gourmand — oak, woody, vanilla, smoky

Used in formulas and accords

Used in 3 published formulas

Rhumacetal is an ingredient in 2 perfume formulas and 1 accord in the Formula & Accord Library.

Community formulas

• Mezcal Accord

  Community Formula · Accord

RUŌOD House Originals

Original compositions by RUŌOD House.

• Dark Rum Cabinet

  RUŌOD House Original

• Pipe Smoke Orchard

  RUŌOD House Creation

Further reading

• Building a Gourmand Accord: Vanilla, Caramel and Beyond

  The materials of gourmand perfume — vanillin, ethyl maltol, coumarin, lactones, roasted notes — how to keep them wearable, and color and crystal problems.

Questions about Rhumacetal

Sources

• PubChem — compound 74279, checked 25 October 2026.
• PubChem — GHS classification (the ECHA C&L Inventory notifications and any harmonised EU entry), read 26 October 2026.
• PubChem — 1,1-diethoxycyclohexane (JECFA description) (CID 74279) — odour database.
• Fraterworks — Rhumacetal — 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.