3-Chloro-2,3-dihydrothiophene 1,1-dioxide
3-Chloro-2,3-dihydrothiophene 1,1-dioxide (CAS: 42925-42-8) is a halogenated heterocyclic compound with the molecular formula C4H5ClO2S and a molecular weight of 152.60 g/mol. This substance serves as a valuable building block in chemical synthesis, particularly for the construction of complex organic molecules. Its structure, featuring a thiophene dioxide ring with a chlorine substituent, makes it a useful intermediate in the development of novel chemical entities for research and industrial applications.
- Synonyms
- 42925-42-8C4H5ClO2S

Chemical Synthesis Intermediate
Utilised as a key building block in organic synthesis for creating more complex molecular structures. Its reactivity allows for diverse chemical transformations.
Heterocyclic Compound Research
Serves as a reagent in academic and industrial research focused on developing new heterocyclic compounds with potential applications in various fields.
Pharmaceutical Intermediate Development
A potential intermediate in the multi-step synthesis of active pharmaceutical ingredients (APIs). Its unique structure can be incorporated into drug candidates.
| Molecular weight | 152.60 |
|---|---|
| Empirical formula | C4H5ClO2S |
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 3-Chloro-2,3-dihydrothiophene 1,1-dioxide used for?
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3-Chloro-2,3-dihydrothiophene 1,1-dioxide is primarily used as a chemical synthesis intermediate and a building block in the research and development of new heterocyclic compounds, potentially including pharmaceutical intermediates.
What is the CAS number and chemical formula for this compound?
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The CAS number is 42925-42-8, and the empirical formula (Hill notation) is C4H5ClO2S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this chemical for research and development purposes. The specific assay and purity are available on the product's Certificate of Analysis. We do not represent this product as USP, BP, or EP grade.
What are the safety considerations when handling 3-Chloro-2,3-dihydrothiophene 1,1-dioxide?
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Users should consult the Safety Data Sheet (SDS) before handling. This compound requires appropriate personal protective equipment (PPE) to avoid contact and inhalation. It may cause skin irritation, serious eye irritation, and respiratory irritation.
How is this chemical packed, shipped, and exported?
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Tech Serve Solutions adheres to strict international regulations for packing, shipping, and exporting chemicals. Products are securely packaged to ensure integrity during transit and handled by experienced logistics professionals.
How can I request a sample or quote for 3-Chloro-2,3-dihydrothiophene 1,1-dioxide?
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You can request a sample or a quote by contacting our sales team directly through the website or by calling our customer service number. Please specify the required quantity and your delivery location.
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