Rum Acetal – the Boozy Rum Note in Detail
Rum Acetal by Givaudan – The Complete Reference
There are two materials that carry "rum" in the name – and only one of them can you use with complete transparency. This reference explains the difference, tells why a European food regulator took a closer look in 2017, and shows where Rum Acetal really has its moment in the formula.
Contents
- What is Rum Acetal?
- What does it smell like?
- Two "rums" – an important distinction
- Role in the formula
- Quick reference: chemistry and safety
- Further questions
1. What is Rum Acetal?
Rum Acetal is chemically 1,1-diethoxycyclohexane (CAS 1670-47-9) – a single, clearly defined molecular compound from the class of acetals. Unlike what the name suggests, it is not a complex rum reconstruction, but a single, precisely characterized building block with a rum-like character.
2. What does it smell like?
The official sensory profile describes Rum Acetal as food-like, ethereal, light and green. Remarkable is the material's high vapor pressure – considerably higher than that of most other aroma materials in our range. It accordingly volatilizes quickly and therefore acts in the top note rather than the base note. According to official classification, Rum Acetal belongs to the "fruity" fragrance family – not "gourmand," as one might initially suspect for a "rum" material.
3. Two "rums" – an important distinction
In the aroma-materials industry, two different materials circulate under a similar name, and the confusion is astonishingly widespread:
"Rum ether" (CAS 8030-89-5) is the classic flavoring, used since the 19th century in baked goods, confectionery and beverages. It is produced industrially by reacting pyroligneous acid (a wood-pyrolysis product) with ethanol under oxidative conditions in the presence of manganese dioxide and sulfuric acid – a process that produces a complex mixture of 84 different volatile components. In 2017, the European Food Safety Authority (EFSA) published a scientific opinion (FGE.500) on this material and found that among the process-related components there are substances of concern regarding genotoxicity.
Rum Acetal (CAS 1670-47-9), the material offered here, is chemically something completely different: a single, well-defined compound without the process-related complexity of the classic rum ether. Givaudan's safety data sheet lists for Rum Acetal exclusively a classification as an eye irritant (H319) – no water hazard, no skin sensitization, no classification as dangerous goods for transport.
4. Role in the formula
Rum Acetal does not build a rum accord single-handedly – it gives it the first breath. A second before oak wood, vanilla or damascone set in, this very molecule creates that deceptively recognizable alcoholic impulse – light, green, almost edible – that makes the nose believe a bottle has been opened somewhere nearby.
Boozy-gourmand perfumery – from Jazz Club (Maison Margiela, Alienor Massenet) to Black Phantom (By Kilian, Sidonie Lancesseur) – builds on exactly this principle: rum on the skin is not a single note, but a choreographed sequence of impressions. Rum Acetal is written for their first bars – the volatile, alcoholic opening, before the heavier, longer-lasting materials build the real depth.
Beyond the classic gourmand application, Rum Acetal is also used as a fixative element in oriental compositions, where it gives tobacco and woody accords an aged, liqueur-like warmth – an application that goes beyond the obvious rum context.
5. Quick reference: chemistry and safety
You will find the complete physico-chemical data as well as the safety information on the product page. In summary: a single, well-defined acetal compound by Givaudan with a classification as an eye irritant (H319), without water hazard or transport regulation as dangerous goods.
Frequently asked questions about Rum Acetal
Is Rum Acetal the same as "rum ether"?
No. "Rum ether" (CAS 8030-89-5) is a complex mixture of 84 components obtained industrially by wood pyrolysis. Rum Acetal (CAS 1670-47-9) is a single, clearly defined chemical compound with its own transparent safety profile.
Why did EFSA investigate "rum ether"?
In 2017, EFSA found in its scientific opinion FGE.500 that among the process-related components of the classic rum ether there are substances of concern regarding genotoxicity. This assessment concerns the other material, not offered here.
What is Rum Acetal typically used for?
For boozy-gourmand compositions, as a volatile top-note accent, and as a fixative element in tobacco and woody accords of oriental compositions.
What dosage should be used?
The usual usage range is up to 2% in the fragrance concentrate.