Flavor ingredient regulatory record
d,l-Menthone-1,2-glycerol ketal
d,l-Menthone-1,2-glycerol ketal is a ketone in the mint family, FEMA GRAS under FEMA number 3808 (CAS 63187-91-7). Its odor is minty, fresh, cool, herbal.
- FEMA
- 3808
- CAS
- 63187-91-7
- JECFA
- 445
- EU FL
- 06.120
- Formula
- C13H24O3
GRAS status: FEMA GRAS, publication 17. Recorded by FDA in the Substances Added to Food inventory under CAS 63187-91-7.
Structure
Identity
Also known as: 1,4-Dioxaspiro[4.5]decane-2-methanol, 9-methyl-6-(1-methylethyl)-, 9-Methyl-6-(1-methylethyl)-1,4-dioxaspiro[4.5]decane-2-methanol, Frescolat MGA, Menthone glycerin acetal, Menthone glyceryl ketal, 6-Isopropyl-9-methyl-1,4-dioxaspiro[4,5]decane-2-methanol, (6-Isopropyl-9-methyl-1,4-dioxaspiro[4.5]decan-2-yl)methanol, Fema Gras 3808, Menthone glycerine acetal, (9-Methyl-6-propan-2-yl-1,4-dioxaspiro[4.5]decan-3-yl)methanol, [9-Methyl-6-(propan-2-yl)-1,4-dioxaspiro[4.5]decan-2-yl]methanol, Menthone glycerin ketal.
Can d,l-Menthone-1,2-glycerol ketal be labeled natural?
d,l-Menthone-1,2-glycerol ketal occurs in nature, so the label depends on the route: d,l-Menthone-1,2-glycerol ketal won from a natural source by a physical, enzymatic or microbiological process is natural flavor in the United States, and synthesized d,l-Menthone-1,2-glycerol ketal is artificial. In the EU and UK the natural claim likewise needs the natural route, while Mercosur and Mexico keep a third class, identical-to-natural, for the synthetic material.
- United States
- Natural or artificial, by process
- European Union and UK
- Natural only from natural material
- Mercosur and Mexico
- Natural or identical-to-natural
How each market defines the classes: natural vs artificial flavor under 21 CFR 101.22.
Regulatory status, with citations
United States
d,l-Menthone-1,2-glycerol ketal is FEMA GRAS under FEMA number 3808. It is cited in the Code of Federal Regulations at 21 CFR 172.515.
European Union and United Kingdom
Listed on the Union List of flavouring substances as FL 06.120, Annex I Part A under Regulation (EC) 1334/2008, evaluation status approved (JECFA). The UK retains the same list.
JECFA (WHO / FAO)
JECFA number 445, evaluated at the 51st meeting in 1998. no safety concern at current levels of intake.
Other US flags
Not on the California Proposition 65 list. Listed on the EPA TSCA inventory.
TSCA Inventory status
A flavor ingredient is also an industrial chemical. d,l-Menthone-1,2-glycerol ketal appears on the EPA Toxic Substances Control Act Chemical Substance Inventory under CAS 63187-91-7, where EPA names it 1,4-Dioxaspiro[4.5]decane-2-methanol, 9-methyl-6-(1-methylethyl)-.
Active in US commerce
EPA designates this substance active, so no Notice of Activity Form B is required before manufacturing. What active and inactive mean.
EPA regulatory flags
| Flag | EPA definition | What it obliges |
|---|---|---|
| PMN | Indicates a commenced PMN substance. | Nothing new. The substance already went through premanufacture review and someone filed a notice of commencement, which is why it is on the Inventory. It is an existing chemical and needs no new premanufacture notice. Read more |
PMN does not establish: The flag records how the substance arrived, not what may be done with it. Check the flags beside it.
From the EPA non-confidential TSCA Inventory, July 2026 release. EPA also maintains a confidential portion it does not publish. Search the Inventory by CAS number.
Odor and taste
Odor: Minty, fresh, cool, herbal.
Where it is used
d,l-Menthone-1,2-glycerol ketal is used in beverage, confection, oral care and flavoring, typically as a mint note.
Structurally similar flavor ingredients
Flavor ingredients with a GRAS determination closest to d,l-Menthone-1,2-glycerol ketal by structure. Whether one can replace it is a sensory and regulatory call; the reformulation tool works that through.
| Material | FEMA | Similarity | Occurrence |
|---|---|---|---|
| 2-(l-Menthoxy)ethanol | 4154 | 78% | In nature |
| Vanillin 3-(l-menthoxy)propane-1,2-diol acetal | 3904 | 68% | In nature |
| Isovaleraldehyde glyceryl acetal | 4380 | 66% | In nature |
| Menthyl isovalerate | 2669 | 66% | In nature |
| 3,9-Dimethyl-6-(1-methylethyl)-1,4-dioxaspiro[4.5]decan-2-one | 4285 | 65% | In nature |
More ketones in this index
d-Carvone · l-Piperitone · Dihydrocarvone · p-Menthan-2-one · Acetoin · 2,3-Hexanedione
d,l-Menthone-1,2-glycerol ketal FAQ
Does d,l-Menthone-1,2-glycerol ketal have FEMA GRAS status?
d,l-Menthone-1,2-glycerol ketal holds FEMA GRAS status under FEMA number 3808. It is also codified at 21 CFR 172.515.
How do I cite d,l-Menthone-1,2-glycerol ketal by FEMA or CAS number?
Cite d,l-Menthone-1,2-glycerol ketal as FEMA 3808 or CAS 63187-91-7; both point to the same entry. FEMA files it in the mint flavor category.
Can d,l-Menthone-1,2-glycerol ketal be labeled a natural flavor?
Since d,l-Menthone-1,2-glycerol ketal is found in nature, US labeling follows how it was obtained: natural flavor from a natural source and a natural process, artificial when d,l-Menthone-1,2-glycerol ketal is synthesized. In the EU and UK the natural claim likewise needs the natural route, while Mercosur and Mexico keep a third class, identical-to-natural, for the synthetic material.
Can d,l-Menthone-1,2-glycerol ketal be used in the EU and UK?
d,l-Menthone-1,2-glycerol ketal is on the EU Union List of flavouring substances as FL 06.120 (Annex I Part A) under Regulation 1334/2008.
Has JECFA evaluated d,l-Menthone-1,2-glycerol ketal?
Yes. JECFA number 445, evaluated at the 51st meeting in 1998. Conclusion: no safety concern at current levels of intake.
What does d,l-Menthone-1,2-glycerol ketal smell and taste like, and where is it used?
The odor of d,l-Menthone-1,2-glycerol ketal is minty, fresh, cool, herbal. Typical uses are beverage, confection, oral care and flavoring.
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Sources and attribution. The identity and regulatory facts on this page are taken from the FDA Substances Added to Food inventory, a US government record, which lists this substance as MENTHONE 1,2-GLYCEROL KETAL under CAS 63187-91-7 and carries its FEMA number, its JECFA flavor number. The inventory is searchable at FDA. FDA records its technical effect as flavoring agent or adjuvant.
A FEMA GRAS conclusion is reached by the Expert Panel of the Flavor and Extract Manufacturers Association of the United States, and the FEMA number names that conclusion. FEMA publishes its own entry for this substance in the FEMA Flavor Library, which is the authoritative record of what the Panel decided and is worth reading alongside this page.
Ambrose Compliance is not affiliated with, endorsed by, or sponsored by FEMA. FEMA and FEMA GRAS are used here as identifiers for a published regulatory determination, not as marks of any relationship between FEMA and Ambrose.
About this page. Facts come from the FDA Substances Added to Food inventory, the Code of Federal Regulations, the EPA TSCA Inventory, the EU Union List, JECFA and the Ambrose database, with FEMA's published determination cited where it applies; parts of the text are written by Ambrose AI, which can make mistakes. Check the cited source before relying on anything here. This is not regulatory or legal advice.