(S)-(+)-2-Fluoro-α-methyl-4-biphenylacetic acid
(S)-(+)-2-Fluoro-α-methyl-4-biphenylacetic acid (CAS 51543-39-6), with the molecular formula C6H5C6H3(F)CH(CH3)CO2H and a molecular weight of 244.26 g/mol, is a chiral carboxylic acid. It serves as a valuable building block in asymmetric synthesis and organic chemistry. Its defined stereochemistry makes it particularly useful for creating enantiomerically pure compounds, finding applications in pharmaceutical research and the development of bioactive molecules.
- IUPAC
- (S)-(+)-Flurbiprofen

Chiral Building Block in Organic Synthesis
This compound is a key chiral intermediate. Its specific (S)-configuration is essential for synthesizing enantiopure target molecules in multi-step organic syntheses, particularly in the pharmaceutical sector.
Asymmetric Synthesis
Leveraged in asymmetric synthesis, it enables the controlled creation of chiral centers with high stereoselectivity. This is critical for developing drugs where specific enantiomers exhibit desired therapeutic effects.
Pharmaceutical Intermediate
Used as an intermediate in the synthesis of pharmaceutical agents. Its structural features are incorporated into more complex drug candidates during R&D phases.
Research and Development
Essential reagent in academic and industrial research laboratories for exploring new chemical entities and reaction pathways. Its availability aids in the discovery of novel bioactive compounds.
| Molecular weight | 244.26 |
|---|---|
| Linear formula | C6H5C6H3(F)CH(CH3)CO2H |
| Assay | 98% |
| Optical activity | [α]24/D +43°, c = 1 in chloroform |
| Melting point | 109-110 °C(lit.) |

Hazard statements
- H301Toxic if swallowed
Precautionary statements
- P301IF SWALLOWED
| Protective equipment | Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 2811 6.1 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T |
| Risk statements (R) | 25 |
| Safety statements (S) | 36/37/39-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Gene Information | human ... IL8RA(3577) |
|---|
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 (S)-(+)-2-Fluoro-α-methyl-4-biphenylacetic acid used for?
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(S)-(+)-2-Fluoro-α-methyl-4-biphenylacetic acid is primarily used as a chiral building block in asymmetric synthesis and as an intermediate in pharmaceutical research and development for creating enantiomerically pure compounds.
What is the CAS number and molecular formula?
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The CAS number is 51543-39-6, and the molecular formula is C6H5C6H3(F)CH(CH3)CO2H.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this product with an assay of 98%. We do not represent this product as USP, BP, or EP grade.
How should (S)-(+)-2-Fluoro-α-methyl-4-biphenylacetic acid be handled?
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This compound is classified as Danger (GHS06). Handle with appropriate personal protective equipment, including eyeshields, faceshields, gloves, and a P2 respirator cartridge. Avoid ingestion and ensure adequate ventilation. Refer to the Safety Data Sheet for full handling instructions.
Is this product available for export?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals.
How can I request a sample or quote?
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Please contact our sales team via the website to request a sample or a quotation for (S)-(+)-2-Fluoro-α-methyl-4-biphenylacetic acid.
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