2-Methyl-4-phenyl-2-butanol (CAS 0103-05-09) — Floral Heart Note Fragrance Ingredient
2-Methyl-4-phenyl-2-butanol
CAS 0103-05-09
What Is 2-Methyl-4-phenyl-2-butanol?
2-Methyl-4-phenyl-2-butanol is a synthetic fragrance ingredient used in perfumes and scented products. It contributes a unique aromatic character that enhances floral and woody compositions. This molecule matters because it helps create long-lasting, complex scent profiles while being more stable than some natural alternatives.
Safety Profile
USE WITH AWARENESSWhat Does 2-Methyl-4-phenyl-2-butanol Smell Like?
A sophisticated aroma blending fresh floralcy with subtle woody undertones. Opens with crisp green nuances reminiscent of crushed stems, evolving into a rosy heart with hints of peony. The dry-down reveals a smooth, ambery base with exceptional tenacity. Acts as a harmonizer between bright top notes and deeper base materials.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used as a modern floral enhancer, providing lift to the aquatic accord while adding subtle rosy-woody depth that prevents the composition from becoming too sharp.
Employed as a bridge between the grapefruit top and jasmine heart, contributing a polished fruity-floral character that enhances diffusion.
Chemistry, Properties & Perfumer Guide
The Chemistry
A tertiary alcohol with phenyl substitution, synthesized through Grignard reactions or hydroformylation routes. The branched carbon chain and hydroxyl group create unique steric effects that influence volatility and odor characteristics. Lacks chiral centers but exhibits conformational flexibility that contributes to its multifaceted scent profile.
Physical & Chemical Properties
| Boiling Point | 245 °C (estimated) |
|---|---|
| Density | 0.98 g/cm³ (estimated) |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 1-3% | Up to 5% | Floral compositions |
| Functional Products | 0.1-0.5% | Up to 1% | Fabric conditioners |
Classic Accords
Tip: Use with citrus materials to prevent excessive sweetness in floral compositions.
Alternatives & Comparisons
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No current IFRA restrictions. Listed on IFRA Transparency List.
RIFM Assessment
Under evaluation by RIFM as of 2023.
Sustainability
Synthesized from petrochemical precursors with moderate atom economy. No known ecological toxicity concerns at current production volumes. Offers advantages over natural extracts in consistency and yield.
Explore 2-Methyl-4-phenyl-2-butanol
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References
- Brenna et al. (2012). Synthetic routes to phenylbutanols. Journal of Organic Chemistry. DOI:10.1021/jo300456h
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
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