Ethyl (S)-(−)-4-chloro-3-hydroxybutyrate
Ethyl (S)-(−)-4-chloro-3-hydroxybutyrate (CAS 86728-85-0) is a chiral ester vital for asymmetric synthesis. With a molecular weight of 166.60 g/mol and linear formula ClCH2CH(OH)CH2CO2C2H5, it serves as a key building block in organic synthesis. Its enantiopurity makes it valuable in producing complex molecules where stereochemistry is critical, particularly in the pharmaceutical and fine chemical industries. TSS supplies this high-purity intermediate for demanding chemical applications.

Chiral Building Block
Utilised as a fundamental chiral synthon in the stereoselective synthesis of complex organic molecules. Its defined stereocenter is crucial for constructing enantiomerically pure target compounds.
Pharmaceutical Intermediate
An essential intermediate in the synthesis of various active pharmaceutical ingredients (APIs) where chirality is paramount. It enables the production of stereochemically defined drugs.
Asymmetric Synthesis
Employed in asymmetric reactions to introduce specific stereochemistry, facilitating the creation of chiral compounds with high enantiomeric excess. This is key in developing new therapeutic agents.
Organic Synthesis Reagent
A versatile reagent in general organic synthesis, offering a functionalised chiral fragment for constructing intricate molecular architectures.
| Molecular weight | 166.60 |
|---|---|
| Linear formula | ClCH2CH(OH)CH2CO2C2H5 |
| Assay | 96% |
| Boiling point | 93-95 °C/5 mmHg(lit.) |
| Density | 1.19 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.453(lit.) |
| Optical activity | [α]23/D −14°, neat |
| Optical purity | ee: 97% (GLC) |


Hazard statements
- H302Harmful if swallowed
- H318Causes serious eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- 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) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-41 |
| Safety statements (S) | 26-39 |
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 (S)-(−)-4-chloro-3-hydroxybutyrate used for?
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Ethyl (S)-(−)-4-chloro-3-hydroxybutyrate is primarily used as a chiral building block in asymmetric synthesis and as a key intermediate in the production of pharmaceuticals and other complex organic molecules where stereochemistry is critical.
What is the CAS number and formula for Ethyl (S)-(−)-4-chloro-3-hydroxybutyrate?
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The CAS number is 86728-85-0, and its linear formula is ClCH2CH(OH)CH2CO2C2H5.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Ethyl (S)-(−)-4-chloro-3-hydroxybutyrate with an assay of 96% and an optical purity of 97% ee (GLC). We do not represent this product as USP, BP, or EP grade.
What are the main safety hazards associated with this chemical?
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This chemical is classified with GHS05 and GHS07 symbols and a 'Danger' signal word. It carries hazard statements H302 (Harmful if swallowed) and H318 (Causes serious eye damage). Appropriate personal protective equipment, including eyeshields and gloves, must be used.
How is Ethyl (S)-(−)-4-chloro-3-hydroxybutyrate typically shipped and exported?
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Tech Serve Solutions, as a specialist global supplier and exporter, can arrange for the safe and compliant packing, shipping, and export of Ethyl (S)-(−)-4-chloro-3-hydroxybutyrate to meet international regulations.
How can I request a sample or a quote for this product?
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To request a sample or a quote for Ethyl (S)-(−)-4-chloro-3-hydroxybutyrate, please contact our sales department through the website or direct email, specifying your requirements.
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