(−)-α-Pinene
(−)-α-Pinene, CAS 7785-26-4, is a naturally occurring bicyclic monoterpene with the molecular formula C10H16. It is a clear, colourless liquid possessing a characteristic pine-like aroma. Widely recognised for its role as a chiral building block, it finds significant application in asymmetric synthesis and as a precursor for various fine chemicals and fragrances. Its availability from natural sources makes it a valuable component in diverse chemical processes.
- IUPAC
- (-)-alpha-Pinene,(1S)-(−)-α-Pinene,(1S,5S)-2-Pinene,(1S,5S)-2,6,6-Trimethylbicyclo[3.1.1]hept-2-ene
- Synonyms
- (1S)-(−)-α-Pinene(1S,5S)-2-Pinene(1S,5S)-2,6,6-Trimethylbicyclo[3.1.1]hept-2-ene
Chiral Building Block in Synthesis
As a readily available chiral terpene, (−)-α-Pinene serves as a fundamental starting material or intermediate in the asymmetric synthesis of complex organic molecules, including pharmaceuticals and natural products. Its inherent stereochemistry can be leveraged to control the stereochemical outcome of subsequent reactions.
Fragrance and Flavour Precursor
This compound is a key precursor in the production of aroma chemicals, contributing to the characteristic scents found in pine, citrus, and herbal fragrances. It is used in the synthesis of fragrance ingredients for perfumes, cosmetics, and household products.
Solvent and Reagent
Due to its lipophilic nature, (−)-α-Pinene can function as a solvent in specific organic reactions. It is also employed as a reagent in certain niche chemical transformations and research applications.
| Molecular weight | 136.23 |
|---|---|
| Empirical formula | C10H16 |
| Assay | ≥97.0% (GC)98% |
| Boiling point | 155-156 °C(lit.) |
| Density | 0.874 g/mL at 25 °C |
| Refractive index | n20/D 1.465(lit.) |
| Optical activity | [α]22/D −42°, neat |
| Melting point | -64 °C(lit.) |
| Optical purity | ee: ≥81% (GLC) |
| Vapour pressure | ~3 mmHg (20 °C) |
| Vapour density | 4.7 (vs air) |
| Autoignition temp | 491 °F |
Hazard statements
- H226Flammable liquid and vapour
- H315Causes skin irritation
- H317May cause an allergic skin reaction
- H319Causes serious eye irritation
- H335May cause respiratory irritation
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P273Avoid release to the environment
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P501Dispose of contents and container per local regulations
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 33 °C / 91.4 °F |
| Transport (UN / ADR) | UN 2368 3 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi,N |
| Risk statements (R) | 10-36/37/38-43-50 |
| Safety statements (S) | 26-36/37-61 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is (−)-α-Pinene used for?
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(-)-α-Pinene is primarily used as a chiral building block in asymmetric synthesis, as a precursor for fragrances and flavours, and in certain solvent and reagent applications in organic chemistry.
What is the CAS number and formula for (−)-α-Pinene?
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The CAS number for (−)-α-Pinene is 7785-26-4, and its molecular formula is C10H16.
What grade and purity does Tech Serve Solutions supply for (−)-α-Pinene?
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Tech Serve Solutions supplies (−)-α-Pinene with an assay of ≥97.0% (GC) or 98%. This product is supplied for research and development purposes and is not represented as USP, BP, EP, or other pharmacopoeial grades.
How should (−)-α-Pinene be handled safely?
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(-)-α-Pinene is a flammable liquid and vapour (H226), causes skin irritation (H315), may cause an allergic skin reaction (H317), causes serious eye irritation (H319), may cause respiratory irritation (H335), and is very toxic to aquatic life with long-lasting effects (H410). Always handle in a well-ventilated area, wear appropriate personal protective equipment including eyeshields and gloves, and avoid release to the environment. Refer to the Safety Data Sheet for detailed handling instructions.
How is (−)-α-Pinene packed and shipped by TSS?
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Tech Serve Solutions packs and exports (−)-α-Pinene in compliance with all relevant transport regulations, ensuring secure and safe delivery globally.
How can I request a sample or quote for (−)-α-Pinene?
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To request a sample or a detailed quotation for (−)-α-Pinene, please contact our sales team through the website or by phone, providing your specific requirements.
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