About this material
Watermelon Ketone (Calone)
Calone crystals refer to the solid form of Watermelon Ketone (Calone 1951), a synthetic aromatic compound widely used in perfumery. It was also developed by Firmenich as a powdery crystallised solid in its pure form.
It is a marine or ozonic fragrance ingredient known for its fresh, watery scent with hints of melon and cucumber.
If you prefer working with the pure crystal form of Calone, you can obtain that material here
This unusually unique odourant possesses intense ozonic and marine notes with beautiful floral overtones.
The material is very on trend since it became widely used back in the 90’s and forms the basis for several perfumes, particularly those with a marine theme, such as Davidoff Cool Water and Issey Miyake L’Eau d’Issey, helping define the “aquatic” fragrance category.
Scent character
Highlights from the material’s listed odour profile.
Note position
Top note · Heart note
Material character
A closer lookOdour strength
, recommend smelling in a 10% solution or less
Listed qualitative strength
Tenacity / substantivity
> 600 hour(s) at 10% in DPG
Listed reference conditions
Supplied strength is 10% in DPG.
Fragrance development
Top note · Heart note
Illustrative note development · no measured evaporation data
Molecular identity
C10H10O3
CAS-linked compound reference — Methyl benzodioxepinone
This compound record is linked to the explicitly recorded CAS number. It is not supplier confirmation of the supplied grade, purity, stereochemistry, isomer proportions or complete composition.
Named active material only. These properties do not describe the complete supplied dilution or carrier.
- Reference molecular weight
- 178.18 g/mol
- Reference IUPAC name
- 7-methyl-1,5-benzodioxepin-3-one
More compound properties
Computed and structural reference properties for the named compound. These are not measured supplier specifications or properties of a complete dilution, mixture or batch.
- XLogP (computed)
- 1.9
- Exact mass (Da)
- 178.062994177
- Monoisotopic mass (Da)
- 178.062994177
- Topological polar surface area (Ų)
- 35.5
- Complexity
- 202
- Formal charge
- 0
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 3
- Rotatable bonds
- 0
- Heavy atoms
- 13
- Isotope atoms
- 0
- Atom stereocentres
- 0
- Bond stereocentres
- 0
- Covalent units
- 1
- SMILES
- CC1=CC2=C(C=C1)OCC(=O)CO2
- InChI
- InChI=1S/C10H10O3/c1-7-2-3-9-10(4-7)13-6-8(11)5-12-9/h2-4H,5-6H2,1H3
- InChIKey
- SWUIQEBPZIHZQS-UHFFFAOYSA-N
Reference data checked 2026-10-27.
CAS 28940-11-6 · reference checked 2026-10-27.
Fragrance allergen reference
Generic regulatory reference only. This is not a supplier allergen declaration, measured composition, allergen-free claim or finished-product labelling assessment.
Raw undiluted material reference. These data refer to the named active material, not the complete supplied dilution. A raw-material IFRA ceiling is not a use level for this diluted product. The assessor must account for the actual concentration, carrier and all other formula contributions.
European Union / Northern Ireland
No direct listed-entry CAS match in this jurisdiction’s held reference set. This does not mean the material is allergen-free. Constituents, grouped entries and natural-material composition may require further review.
Finished-cosmetic declaration thresholds: greater than 0.001% leave-on; greater than 0.01% rinse-off. Apply the current target-market rules to the actual complete formulation; no concentration is inferred here.
Commission Regulation (EU) 2023/1545 · Regulation (EU) 2023/1545 with 11 November 2025 corrigendum; checked 2026-10-26.
Held EU transition dates: placing noncompliant products on the market until 2026-07-31; making them available until 2028-07-31. Check applicability and current law for the intended market. 2025 corrigendum.
Great Britain
No direct listed-entry CAS match in this jurisdiction’s held reference set. This does not mean the material is allergen-free. Constituents, grouped entries and natural-material composition may require further review.
Finished-cosmetic declaration thresholds: greater than 0.001% leave-on; greater than 0.01% rinse-off. Apply the current target-market rules to the actual complete formulation; no concentration is inferred here.
Regulation (EC) No 1223/2009, Annex III (Great Britain) · legislation.gov.uk current text checked 2026-10-26.
Current supplier composition or allergen declarations are required to assess naturals, bases, mixtures and actual concentrations. Reference data checked 2026-10-26; bundle 2026-10-27. Supplementary private documents remain separate.
Product specification
| CAS number | 28940-11-6 |
|---|---|
| Odour description (decreasing) | Fresh, Marine, Green, Watermelon, Cucumber, Oceanic, Ozonic |
| Odour strength | High, recommend smelling in a 10% solution or less |
| Perfumery use | Effective from the smallest traces, through to 0.5%Listed perfumery guidance; this is not an IFRA limit. |
| Substantivity | > 600 hour(s) at 10% in DPG |
| Solvent | DPG to give a 10% solution of Watermelon Ketone (Calone) |
| Physical state | Liquid |
| Synonyms | 8-methyl-1,5-benzodioxepin-3-one, Aquamor (IFF), Calone Firmenich |
| IFRA document scope | Where an IFRA document is shared with the raw material, it refers to the raw, undiluted material. It is supplied as a reference for this diluted product; its stated limits are not limits for the supplied dilution. Check the document scope and assess the intended finished formulation. This notice does not confirm that a document is available. |
Safety & handling
Hazard statements:
- H302 Harmful if swallowed.
Precautionary statements:
- P264 Wash thoroughly after handling.
- P270 Do not eat, drink or smoke when using this product.
- P301+P312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell.
- P330 Rinse mouth.
Datasheets & customer documents
Available documents are attached to eligible completed orders in your account.
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Supplementary documents are supplied only where explicitly listed and available. Check documentation information
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Documentation Supply PolicyIFRA formulation guide
Generic reference only — not an IFRA certificate, compliance decision or use recommendation. The Responsible Person and qualified safety assessor must assess the actual finished formula using current applicable IFRA Standards, supplementary documentation where available and the CPSR.
Raw undiluted material reference. These data refer to the named active material, not the complete supplied dilution. A raw-material IFRA ceiling is not a use level for this diluted product. The assessor must account for the actual concentration, carrier and all other formula contributions.
Source: 51st Amendment overview, held source checked 2026-10-21. Bundle 2026-10-27. Individual Standards prevail over the overview.
No direct IFRA overview entry matched the recorded CAS in this held dataset. This does not mean unrestricted use, absence of relevant Standards or compliance. Constituent restrictions may still apply.
IFRA source overview · Individual IFRA Standards and supplementary documentation
Supplier certificates and private documents are separate evidence. Their availability does not determine whether this generic guide is shown. This is a dated local reference, not a live regulatory feed.
Creative ideas to explore
Creative directions, not tested formulas.Salt air and peel
With citrus and transparent woodsExplore a marine sketch with a bright citrus opening and a spare wood outline. Compare it with the marine reference alone, deciding whether the impression suggests open air, a mineral shoreline or a more abstract aquatic direction.
A flower by the sea
With rose and airy floral notesPlace the marine character beside a simple floral accord. Evaluate the flower reference and the aquatic variation together, noticing whether the contrast suggests dewy petals or pushes the composition towards a different watery scene.
Driftwood study
With a dry wood and musk directionSketch a shoreline idea around a restrained wood backdrop. Keep a matching wood-only reference and compare the marine contribution through the evaluation, choosing whether you prefer a noticeable aquatic accent or a subtler atmospheric contrast.







Oluwatoyin (verified owner) –
nice smell. yet to use though