Ethyl (R)-(−)-4-cyano-3-hydroxybutyrate
Ethyl (R)-(−)-4-cyano-3-hydroxybutyrate (CAS: 141942-85-0) is a chiral building block with the linear formula NCCH₂CH(OH)CH₂CO₂C₂H₅ and a molecular weight of 157.17 g/mol. This ester serves as a valuable intermediate in organic synthesis, particularly in asymmetric reactions. Its defined stereochemistry makes it suitable for applications requiring precise molecular architecture in pharmaceuticals and fine chemicals.
- IUPAC
- (R)-(−)-4-Cyano-3-hydroxybutyratic acid, ethyl ester
- Synonyms
- (R)-(−)-4-Cyano-3-hydroxybutyratic acid, ethyl ester

Asymmetric Synthesis
Utilised as a chiral precursor for the stereoselective synthesis of complex organic molecules. Its defined (R)-configuration is crucial for building enantiomerically pure compounds.
Pharmaceutical Intermediates
Serves as a key building block in the multi-step synthesis of active pharmaceutical ingredients (APIs) where chirality is essential for biological activity.
Chiral Building Blocks
Provides a readily available source of chirality for researchers and manufacturers developing new chiral compounds and materials.
Organic Synthesis Reagent
Employed in various organic transformations owing to its functional groups, enabling diverse synthetic pathways for novel chemical entities.
| Molecular weight | 157.17 |
|---|---|
| Linear formula | NCCH2CH(OH)CH2CO2C2H5 |
| Assay | 95% |
| Boiling point | 270 °C(lit.) |
| Density | 1.114 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.448(lit.) |
| Optical activity | [α]25/D −5°, neat |
| Storage temperature | 2-8°C |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 113 °C / 235.4 °F |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
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 Ethyl (R)-(−)-4-cyano-3-hydroxybutyrate used for?
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Ethyl (R)-(−)-4-cyano-3-hydroxybutyrate is primarily used as a chiral building block in asymmetric synthesis and as an intermediate in the production of pharmaceuticals and fine chemicals.
What is the CAS number and chemical formula for Ethyl (R)-(−)-4-cyano-3-hydroxybutyrate?
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The CAS number is 141942-85-0 and the linear formula is NCCH₂CH(OH)CH₂CO₂C₂H₅.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this product with an assay of 95%. It is not represented as USP, BP, EP, or any pharmacopoeia grade.
How should Ethyl (R)-(−)-4-cyano-3-hydroxybutyrate be handled safely?
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This compound is a warning irritant (H315-H319-H335). Handle with appropriate personal protective equipment, including eyeshields and gloves, in a well-ventilated area. Avoid breathing vapours. Store at 2-8°C.
Is this chemical controlled or scheduled?
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The provided data does not indicate that Ethyl (R)-(−)-4-cyano-3-hydroxybutyrate is a controlled or scheduled substance.
How is this product packed and exported?
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This product is available for global export. Standard packaging suitable for chemical reagents is used to ensure safe transit. Specific packaging requirements can be discussed upon request.
How can I request a sample or quote for Ethyl (R)-(−)-4-cyano-3-hydroxybutyrate?
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To request a sample or obtain a quote, please contact our sales team through the website or by direct enquiry, providing your specific requirements.
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