Allyl (2-methylbutoxy)acetate (CAS 67634-01-09) — Green Top to middle Note Fragrance Ingredient
Allyl (2-methylbutoxy)acetate
CAS 67634-01-09
What Is Allyl (2-methylbutoxy)acetate?
Allyl (2-methylbutoxy)acetate is a synthetic fragrance ingredient used to create fruity, green, and slightly floral notes in perfumes and scented products. You’ll encounter it in modern floral-fruity compositions, particularly those aiming for a fresh, crisp character. This molecule matters because it offers perfumers a versatile tool for building contemporary accords that bridge fruity top notes with floral heart notes, often contributing to fragrances that smell both natural and innovative.
Safety Profile
GENERALLY SAFEWhat Does Allyl (2-methylbutoxy)acetate Smell Like?
Allyl (2-methylbutoxy)acetate opens with a bright, crisp green apple note that quickly evolves into a juicy pear-like character. The heart reveals a delicate floralcy reminiscent of lily-of-the-valley, with a subtle tropical nuance. As it dries down, it maintains a clean, slightly woody-fruity character that blends seamlessly with other notes. The overall effect is like biting into a perfectly ripe Bartlett pear while standing in a sunlit orchard – fresh, aqueous, and subtly sweet without being cloying.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used here to enhance the crisp, refreshing top notes, contributing to the fragrance’s signature ‘just-brewed’ tea leaves character while adding subtle fruity nuances.
Provides the juicy pear-like facets that complement the citrus opening, helping create the fragrance’s distinctive Mediterranean freshness.
Chemistry, Properties & Perfumer Guide
The Chemistry
Allyl (2-methylbutoxy)acetate is an ester formed from allyl alcohol and 2-methylbutoxyacetic acid. As a synthetic material, it’s typically produced via esterification reactions under acidic conditions. The branched alkyl chain contributes to its unique fruity-green odor profile. While not found in nature, its structural elements mimic those found in various fruit esters, allowing it to blend naturally with botanical extracts despite being wholly synthetic.
Physical & Chemical Properties
| Appearance | Colorless to pale yellow liquid |
|---|---|
| Odor Strength | Medium |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Fresh fruity-floral modifier |
| Functional Fragrance | 0.1-1% | Up to 3% | Adds crispness to fruity compositions |
Classic Accords
Tip: Use to bridge citrus top notes with floral heart notes in modern fresh florals.
Alternatives & Comparisons
Offers similar fruity-green effects but with more pronounced tropical pineapple nuances and greater tenacity.
Provides a simpler pear-like note when a less complex fruity character is desired.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not currently restricted by IFRA standards.
RIFM Assessment
Not currently evaluated by RIFM – treat as new chemical entity.
Sustainability
As a synthetic material, Allyl (2-methylbutoxy)acetate has minimal environmental impact from sourcing. Production typically uses petrochemical feedstocks, but its high potency means small quantities are effective. No known issues with biodegradability, though full ecotoxicological profile remains to be established.
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References
- Bauer, K. et al. (2001). Common Fragrance and Flavor Materials. Wiley-VCH.
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
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