d-alpha-Terpineol acetate (CAS 7785-54-8) — Woody Middle Note Fragrance Ingredient
d-alpha-Terpineol acetate
CAS 7785-54-8
What Is d-alpha-Terpineol acetate?
d-alpha-Terpineol acetate is a synthetic fragrance ingredient often found in perfumes and household products for its fresh, pine-like scent. It helps create clean, outdoorsy fragrance profiles. This ingredient matters because it provides cost-effective alternatives to natural pine oils while maintaining consistent quality in mass-market products.
Safety Profile
GENERALLY SAFEWhat Does d-alpha-Terpineol acetate Smell Like?
d-alpha-Terpineol acetate opens with a crisp, uplifting pine needle freshness reminiscent of mountain air. The heart develops into a cleaner, slightly sweet woody character like sawn lumber in sunlight. Dry-down reveals subtle earthy undertones akin to damp forest soil after rain, with excellent tenacity that prevents harshness.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used as the core pine accord to create its iconic Italian barbershop freshness.
Provides radiant woody base notes that complement the citrus-berry opening.
2D Molecular Structure
SMILES: CC(=O)OC(C)(C)[C@@H]1CCC(C)=CC1
Chemistry, Properties & Perfumer Guide
The Chemistry
d-alpha-Terpineol acetate is a monoterpenoid ester derived from pine oil components. Industrially produced via acetylation of α-terpineol with acetic anhydride. The chiral center at C-4 creates stereoisomers with slightly different olfactory properties, with the d-form being preferred for its cleaner scent profile.
Physical & Chemical Properties
| Boiling Point | 220 °C |
|---|---|
| Density | 0.953 g/cm³ |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 2-5% | Up to 10% | Woody fresh modifier |
| Household Cleaners | 0.5-2% | Up to 3% | Provides pine freshness |
Classic Accords
Tip: Use with citrus top notes to prevent excessive woodiness.
Alternatives & Comparisons
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not restricted under IFRA standards.
RIFM Assessment
RIFM assessment confirms safe use at current industry levels.
Sustainability
Synthetic production reduces pressure on natural pine forests while ensuring consistent quality. Manufacturing uses standard petrochemical feedstocks with typical environmental controls.
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References
- Burdock, G.A. (2010). Fenaroli’s Handbook of Flavor Ingredients. CRC Press.
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
Report a data errorIngredient Data Sheet
CAS 7785-54-8Physical Properties
| Molecular Weight | 196.29 g/mol🔬 PubChem |
| LogP (Octanol-Water) | 2.4🔬 PubChem |
| Boiling Point | 230 °C🔬 EPA CompTox |
| Vapor Pressure | 0.0457 mmHg @ 25°C📊 OPERA |
| Flash Point | 83 °C🔬 EPA CompTox |
| Involatility Index | 0.0035💻 Calculated |
| log Kp (skin permeability) | -2.193💻 Calculated |
| SMILES | CC1=CCC(CC1)C(C)(C)OC(=O)C🔬 PubChem |
Volatility & Performance
| Fragrance Note | Heart💻 Calculated |
| Volatility Class | Very slow💻 Calculated |
| Persistence Score | 2.3 / 5💻 Calculated |
Odor & Flavor
| Primary Descriptors | greenwoody• leffingwell |
| Functional Groups | esteretheralkene💻 RDKit |
Physical data: PubChem (NIH/NLM), U.S. EPA CompTox Dashboard, EPA OPERA models, RDKit. Odor & flavor: Arctander (Perfume & Flavor Chemicals), Fenaroli's Handbook of Flavor Ingredients, Leffingwell. Thresholds: van Gemert (Compilations of Odour Threshold Values). Regulatory: IFRA Standards 51st, FEMA GRAS. Trade names: Surburg (Common Fragrance & Flavor Materials). All data compiled and cross-referenced for perfumertools.com.
Physicochemical Properties
DTXSID: DTXSID001014412
Physical Properties
| Molecular Weight | 196.29 g/mol🔬 EPA CompTox |
| Density | 0.95 g/cm^3📊 OPERA |
| Boiling Point | 234.836 °C📊 OPERA |
| Melting Point | 12.116 °C📊 OPERA |
| Flash Point | 85.327 °C📊 OPERA |
| Refractive Index | 1.467 Dimensionless📊 OPERA |
| Molar Volume | 203.967 cm^3/mol📊 OPERA |
Partition & Solubility
| LogP (Octanol-Water) | 3.934 Log10 unitless📊 OPERA |
| LogD (pH 5.5) | 3.934 Log10 unitless📊 OPERA |
| LogD (pH 7.4) | 3.934 Log10 unitless📊 OPERA |
| LogKoa (Octanol-Air) | 5.73 Log10 unitless📊 OPERA |
| Water Solubility | 0.001 mol/L📊 OPERA |
| Henry's Law Constant | 0 atm-m3/mole📊 OPERA |
Transport Properties
| Vapor Pressure | 0.053 mmHg📊 OPERA |
| Viscosity | 2.924 cP📊 OPERA |
| Surface Tension | 30.378 dyn/cm📊 OPERA |
| Thermal Conductivity | 130.033 mW/(m*K)📊 OPERA |
Molecular Descriptors
| Topological Polar Surface Area | 26.3 Ų💻 Computed |
| H-Bond Donors | 0 count💻 Computed |
| H-Bond Acceptors | 2 count💻 Computed |
| Rotatable Bonds | 2 count💻 Computed |
| Aromatic Rings | 0 count💻 Computed |
| Molar Refractivity | 56.581 cm^3/mol📊 OPERA |
| Polarizability | 22.43 Å^3📊 OPERA |
Data Sources:
🔬 EPA Experimental data from U.S. EPA CompTox Chemicals Dashboard & CTX APIs. 📊 OPERA Predicted using EPA's OPERA QSAR models. 💻 Computed Calculated from SMILES using RDKit.
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