About this material
Ethylene Brassylate is the quiet architect of enduring fragrance—an exquisitely refined macrocyclic musk prized for its elegance, subtlety, and remarkable staying power.
Much like the rare musks once found in nature, it possesses an exceptional tenacity, anchoring compositions with a soft, sensual warmth that lingers beautifully on the skin.
At the heart of its allure lies versatility. Ethylene Brassylate is rarely a soloist; instead, it performs in perfect harmony with other musks, enriching blends with a delicate sweetness while lending a luminous, floral softness.
Even at concentrations below one percent, its presence is unmistakable—an invisible thread that binds and elevates the entire perfume structure.
Celebrated by perfumers for its dual role as both fixative and intensifier, it enhances floral accords with a gentle diffusion, allowing petals to bloom more fully and last far longer.
The result is a fragrance that feels effortlessly polished, balanced, and enduring.
Beyond fine fragrance, its stability makes it a trusted choice in soap and personal care formulations, where it maintains its integrity without causing discolouration—preserving both scent and aesthetic.
Ethereal yet dependable, Ethylene Brassylate is an essential ingredient for those seeking to craft perfumes of depth, softness, and lasting sophistication.
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

C15H26O4
CAS-linked compound reference — Ethylene brassylate
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
- 270.36 g/mol
- Reference IUPAC name
- 1,4-dioxacycloheptadecane-5,17-dione
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)
- 4.2
- Exact mass (Da)
- 270.18310931
- Monoisotopic mass (Da)
- 270.18310931
- Topological polar surface area (Ų)
- 52.6
- Complexity
- 237
- Formal charge
- 0
- Hydrogen bond donors
- 0
- Hydrogen bond acceptors
- 4
- Rotatable bonds
- 0
- Heavy atoms
- 19
- Isotope atoms
- 0
- Atom stereocentres
- 0
- Bond stereocentres
- 0
- Covalent units
- 1
- SMILES
- C1CCCCCC(=O)OCCOC(=O)CCCCC1
- InChI
- InChI=1S/C15H26O4/c16-14-10-8-6-4-2-1-3-5-7-9-11-15(17)19-13-12-18-14/h1-13H2
- InChIKey
- XRHCAGNSDHCHFJ-UHFFFAOYSA-N
Reference data checked 2026-10-27.
CAS 105-95-3 · 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 | 105-95-3 |
|---|---|
| Odour description (decreasing) | Musk, Powdery, Sweet, Floral, Ambrette-like, with Woody, Spicy & Vanilla Nuances |
| Solvent | None |
| Physical state | Liquid — Liquid at normal room temperature; may solidify in unusually cold storage (reported melting range about 0–7 °C). |
| Synonyms | Astrotone, 1,4-dioxacycloheptadecane-5,17-dione, Musk T |
| Molecular formula | C15H26O4 |
Additional listed details
Typical Use: 0.5 to 3.0%
Safety & handling
Hazard statements:
- H411 Toxic to aquatic life with long lasting effects.
Precautionary statements:
- P273 Avoid release to the environment.
- P391 Collect spillage.
- P501 Dispose of contents/container to: approved disposal site.
Professional/Industrial use only.
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.A petal backdrop
With rose and a simple floral accordExplore the musk material as a setting for a familiar flower. Compare the flower alone and the musk variation through the evaluation, focusing on the texture you perceive and whether the flower remains distinct against its new backdrop.
Quiet woods
With sandalwood and transparent woodsBuild a spare wood-and-musk study with only a few moving parts. Compare soft and dry wood directions separately, then choose the combination whose balance feels closest to your intended outline instead of adding every appealing note.
Clean brightness
With bergamot and an airy floral ideaTry a brighter musk direction with citrus as the opening contrast. Assess it beside a matching reference without the citrus, noting how the clean, floral or woody aspects you actually perceive develop over the evaluation.






RJR (verified owner) –
Another versatile musk that blends well
Oluwatoyin (verified owner) –
excellent, worked well
Ryan (verified owner) –
Superb
Simon Ilinkin (verified owner) –
suson.teodor (verified owner) –
Smooth, powdery white musk with great stability and diffusion. Perfect for rounding out floral or woody bases. Excellent purity and fast shipping.
jayeshharji (verified owner) –
One of my favourite musk ingredients. Clean, somewhat powdery, somewhat floral, somewhat sweet that really helps with overall longevity of final compistion.