Cyclooct-4-en-1-yl methyl carbonate (CAS 87731-18-8) — Green Top Note Fragrance Ingredient
Cyclooct-4-en-1-yl methyl carbonate
CAS 87731-18-8
What Is Cyclooct-4-en-1-yl methyl carbonate?
Cyclooct-4-en-1-yl methyl carbonate is a synthetic fragrance ingredient used in modern perfumery. It creates fresh, ozonic, and marine-like effects in fragrances. This molecule matters because it helps perfumers achieve contemporary aquatic and clean scent profiles without relying on traditional marine materials.
Safety Profile
USE WITH AWARENESSWhat Does Cyclooct-4-en-1-yl methyl carbonate Smell Like?
Cyclooct-4-en-1-yl methyl carbonate opens with a crisp, ozonic freshness reminiscent of sea breeze and clean linen. The heart reveals subtle marine nuances with a slightly metallic edge, like wet stones after rain. As it dries down, it maintains a persistent aquatic character with faint woody-musky undertones. The overall effect is modern and minimalist – imagine the scent of a high-tech laboratory synthesizing ocean air.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used to enhance the modern aquatic accord, contributing to the signature fresh-oceanic character that defined 1990s masculine fragrances.
Provides crisp top notes that complement the water lily accord, creating a sense of purity and transparency.
Chemistry, Properties & Perfumer Guide
The Chemistry
Cyclooct-4-en-1-yl methyl carbonate belongs to the cyclic carbonate ester class. The molecule features an eight-membered ring with one double bond and a methyl carbonate functional group. It is produced synthetically through esterification reactions between cyclooct-4-en-1-ol and methyl chloroformate. The unsaturated ring structure contributes to its volatility and fresh odor characteristics.
Physical & Chemical Properties
| Appearance | Clear liquid |
|---|---|
| Odor Strength | Medium |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Modern aquatic accords |
| Functional Products | 0.1-0.5% | Up to 1% | Fresh laundry applications |
Classic Accords
Tip: Use with citrus top notes to enhance freshness and prevent harshness in marine compositions.
Alternatives & Comparisons
Provides stronger melon-watermelon notes when a sweeter aquatic effect is desired.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No IFRA restrictions currently apply to this material.
RIFM Assessment
Under review by RIFM for comprehensive safety assessment.
Sustainability
As a synthetic material, Cyclooct-4-en-1-yl methyl carbonate has minimal environmental impact from sourcing. Production requires standard petrochemical feedstocks. The material’s potency allows for low usage levels, reducing overall environmental load in formulations.
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References
- Bauer, K. et al. (2001). Common Fragrance and Flavor Materials.
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
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