1,3-Oxathiane,2-ethyl-4,4-dimethyl- (CAS 444880-09-5) — Woody Middle Note Fragrance Ingredient
1,3-Oxathiane,2-ethyl-4,4-dimethyl-
CAS 444880-09-5
What Is 1,3-Oxathiane,2-ethyl-4,4-dimethyl-?
1,3-Oxathiane,2-ethyl-4,4-dimethyl- is a synthetic fragrance ingredient used in modern perfumery. It contributes unique olfactory characteristics to fragrances, though it’s not commonly encountered in everyday products outside of niche perfumes. This molecule matters because it represents the innovative edge of perfumery, where chemists create novel scent profiles that don’t exist in nature.
Safety Profile
USE WITH AWARENESSWhat Does 1,3-Oxathiane,2-ethyl-4,4-dimethyl- Smell Like?
This synthetic molecule offers a complex olfactory profile that evolves on skin. Initially presenting with sharp, almost metallic top notes, it quickly transitions into a heart characterized by earthy, slightly sulfurous nuances reminiscent of tropical fruits. The dry-down reveals a lingering woody-ambery character with subtle spice undertones. Its behavior resembles the transformation of some thiol compounds but without their aggressive edge.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used as the sole featured ingredient to showcase its unique evolving character, demonstrating how single molecules can create complex scent experiences.
Employed as an enhancer for green floral accords, adding depth and modernity to the composition’s synthetic nature theme.
Chemistry, Properties & Perfumer Guide
The Chemistry
1,3-Oxathiane,2-ethyl-4,4-dimethyl- belongs to the heterocyclic class of sulfur-containing compounds. The oxathiane ring structure combines oxygen and sulfur atoms in a six-membered ring, with ethyl and dimethyl substitutions creating steric effects that influence its odor properties. Synthesis typically involves cyclization reactions of appropriate mercapto-alcohol precursors under acidic conditions. The sulfur atom contributes significantly to the molecule’s olfactory characteristics.
Physical & Chemical Properties
| Molecular Class | Heterocyclic (oxathiane) |
|---|
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Used as a modifier and diffuser |
| Functional Fragrance | 0.1-0.5% | Up to 1% | Limited use due to potency |
Classic Accords
Tip: Use sparingly in woody compositions to add diffusion and subtle sulfurous complexity.
Alternatives & Comparisons
Similar sulfurous character but with less potency and more floral aspects, suitable when a softer effect is desired.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No specific IFRA restrictions reported. General guidelines for sulfur compounds apply.
RIFM Assessment
Limited assessment available. Considered safe at current usage levels based on structural analogs.
Sustainability
As a synthetic material, its production avoids natural resource depletion but requires energy-intensive chemical processes. Future development may focus on greener synthesis routes.
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References
- Brenna et al. (2012). Heterocyclic Sulfur Compounds in Modern Perfumery. Flavour and Fragrance Journal.
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
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