Aldehyde C18 Coconut (Gamma-Nonalactone)
Coconut, Creamy, Lactonic, Coumarin, Powerful
About this material
Aldehyde C18 Coconut is one of the most popular materials used for re-creating coconut notes and for adding a creaminess to compositions.
It’s sweet, creamy, coconut with oily buttery nuances.
Widely used, powerful and reminiscent of desiccated Coconut. Its intense sweetness and tenacity is often utilised along with that of Undecanolide (Aldehyde C14) in Gardenia, Tuberose, Honeysuckle, Stephanotis, Plumeria, Jasmine and many other heavy floral type fragrances.
Scent character
Highlights from the material’s listed odour profile.
Note position
Base note
Material character
A closer lookOdour strength
Not listed
Tenacity / substantivity
Not listed
Fragrance development
Base note
Illustrative note development · no measured evaporation data
Molecular identity
C9H16O2
CAS-linked compound reference — Gamma-Nonalactone
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.
- Reference molecular weight
- 156.22 g/mol
- Reference IUPAC name
- 5-pentyloxolan-2-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)
- 2.2
- Exact mass (Da)
- 156.115029749
- Monoisotopic mass (Da)
- 156.115029749
- Topological polar surface area (Ų)
- 26.3
- Complexity
- 132
- Formal charge
- 0
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 2
- Rotatable bonds
- 4
- Heavy atoms
- 11
- Isotope atoms
- 0
- Atom stereocentres
- 1
- Bond stereocentres
- 0
- Covalent units
- 1
- SMILES
- CCCCCC1CCC(=O)O1
- InChI
- InChI=1S/C9H16O2/c1-2-3-4-5-8-6-7-9(10)11-8/h8H,2-7H2,1H3
- InChIKey
- OALYTRUKMRCXNH-UHFFFAOYSA-N
Reference data checked 2026-10-27.
CAS 104-61-0 · 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-material reference based on recorded CAS numbers. A CAS match identifies a reference entry; it does not verify the supplied grade, composition, purity or finished-product compliance. Naturals, bases and mixtures require composition review.
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 | 104-61-0 |
|---|---|
| Odour description (decreasing) | Coconut, Creamy, Lactonic, Coumarin, Powerful |
| Solvent | None |
| Physical state | Liquid |
| Synonyms | Coconut Aldehyde, Gamma-Nonalactone, Nonanolide |
Safety & handling
Signal word: Warning
Hazard statements:
- Causes mild skin irritation.
- Harmful to aquatic life.
- Harmful to aquatic life with long lasting effects.
Precautionary statements:
- If skin irritation occurs: Get medical advice/attention.
- Store away from incompatible materials.
- Dispose of contents/container in accordance with local/regional/national/international regulations.
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-material reference based on recorded CAS numbers. A CAS match identifies a reference entry; it does not verify the supplied grade, composition, purity or finished-product compliance. Naturals, bases and mixtures require composition review.
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.Fruit with its peel
With citrus and leafy contrastsExplore a fruit sketch that includes a suggestion of peel or leaf. Compare those accents separately against the fruity reference, noticing whether they create a fresher impression or pull the idea away from the fruit you imagined.
An orchard in bloom
With rose or another familiar flowerPlace the fruity direction beside a simple floral accord. Keep a flower-only comparison and assess whether the fruit reads as a supporting accent, a juicy centre or a separate note that needs a different setting.
Fruit and cream
With vanilla and soft wood directionsSketch a more rounded fruit idea with vanilla as one variation and soft wood as another. Compare sweetness and texture before combining both, leaving room for the original fruity character to remain identifiable in the study.






Simon Ilinkin (verified owner) –
Anis Dadou –
Very powerful coconut note. Very easy to overdo it. By itself smells like cheap coconut shampoo, but often mixed with C14 (peach) vanilla etc to give a creamy effect without making everything coconut. Long lasting and diffusive