(R)-(−)-Benzoin
(R)-(−)-Benzoin (CAS: 5928-66-5), with the molecular formula C14H12O2 and a molar mass of 212.24 g/mol, is a chiral ketone. It serves as a valuable building block in organic synthesis, particularly in asymmetric reactions. Its specific stereochemistry makes it useful for constructing complex molecules where precise spatial arrangement is critical. This compound is supplied by TSS for research and development purposes.
- IUPAC
- (R)-2-Hydroxy-2-phenylacetophenone

Asymmetric Synthesis
(R)-(−)-Benzoin is employed as a chiral auxiliary or precursor in stereoselective synthesis. It enables the creation of enantiomerically enriched products, vital for pharmaceutical development and fine chemical production.
Organic Building Block
This compound acts as a versatile organic building block due to its functional groups (hydroxyl and ketone). It can be modified to introduce chirality and specific structural features into target molecules.
Research and Development
Used in academic and industrial laboratories for exploring new synthetic pathways and developing novel compounds. Its well-defined stereochemistry is advantageous for mechanistic studies.
| Molecular weight | 212.24 |
|---|---|
| Linear formula | C6H5CH(OH)COC6H5 |
| Assay | 98% |
| Optical activity | [α]24/D −115°, c = 1.5 in acetone |
| Optical purity | ee: 99% (HPLC) |
| Melting point | 135-137 °C(lit.) |
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 (R)-(−)-Benzoin used for?
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(R)-(−)-Benzoin is primarily used in asymmetric synthesis and as a chiral building block in organic chemistry research and development.
What is the CAS number and molecular formula for (R)-(−)-Benzoin?
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The CAS number is 5928-66-5, and the molecular formula is C6H5CH(OH)COC6H5.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies (R)-(−)-Benzoin with an assay of 98% and an optical purity of 99% ee (HPLC). TSS does not represent this product as USP, BP, or EP grade.
What are the safety and handling considerations for (R)-(−)-Benzoin?
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(R)-(−)-Benzoin is classified under WGK 3 in Germany, indicating it is hazardous to water. Appropriate personal protective equipment should be used, and it should be handled with care to avoid environmental release.
How is (R)-(−)-Benzoin packed, shipped, and exported?
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Tech Serve Solutions expertly packs, ships, and exports (R)-(−)-Benzoin globally, adhering to all necessary regulations for chemical handling and international transport.
How can I request a quote or sample of (R)-(−)-Benzoin?
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To request a quote or sample of (R)-(−)-Benzoin, please contact our sales team via the website or email provided.
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