Ethenesulfonyl fluoride
Ethenesulfonyl fluoride (CAS: 677-25-8), with the molecular formula C2H3FO2S and a molecular weight of 110.11 g/mol, is a reactive chemical intermediate. It is primarily utilised as a fluorinating reagent and in various synthetic applications within chemical research and development. Its properties make it a valuable component in organic synthesis for introducing the ethenesulfonyl group.
- IUPAC
- ESF,Vinyl sulfonyl fluoride
- Synonyms
- ESFVinyl sulfonyl fluoride

Fluorinating Reagent
Ethenesulfonyl fluoride serves as a specialized reagent for introducing fluorine atoms into organic molecules. It is employed in synthetic organic chemistry for specific fluorination reactions where precise control is required.
Chemical Synthesis Intermediate
This compound acts as a key building block in the synthesis of more complex organic molecules. Its reactive nature allows for versatile transformations in multi-step synthetic pathways.
Organic Synthesis
Utilised in laboratory settings for a range of organic transformations, Ethenesulfonyl fluoride is a tool for researchers developing new chemical entities and exploring novel synthetic methodologies.
| Molecular weight | 110.11 |
|---|---|
| Empirical formula | C2H3FO2S |
| Assay | 95% |
| Density | 1.328 g/mL at 25 °C |
| Refractive index | n20/D 1.385 |




Hazard statements
- H226Flammable liquid and vapour
- H301Toxic if swallowed
- H314Causes severe skin burns and eye damage
- H335May cause respiratory irritation
- H341Suspected of causing genetic defects
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P301IF SWALLOWED
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Flash point | 40 °C / 104 °F |
|---|---|
| Transport (UN / ADR) | UN 2920 3(8) / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T,C |
| Risk statements (R) | 23/24/25-34-68 |
| Safety statements (S) | 26-36/37/39-45 |
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 Ethenesulfonyl fluoride used for?
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Ethenesulfonyl fluoride is primarily used as a fluorinating reagent and an intermediate in chemical synthesis, particularly in organic chemistry research and development.
What are the CAS number and chemical formula for Ethenesulfonyl fluoride?
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The CAS number for Ethenesulfonyl fluoride is 677-25-8, and its chemical formula is C2H3FO2S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Ethenesulfonyl fluoride with an assay of 95%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
What are the main hazards associated with Ethenesulfonyl fluoride?
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Ethenesulfonyl fluoride is a dangerous substance. It is highly flammable (H226), toxic if swallowed, in contact with skin, or if inhaled (H301 + H311 + H331), causes severe skin burns and eye damage (H314), and may cause respiratory irritation (H335). It is also suspected of causing genetic defects (H341).
How is Ethenesulfonyl fluoride handled and shipped?
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Due to its hazardous nature, Ethenesulfonyl fluoride requires careful handling under strict safety protocols. It is classified under UN 2920, Hazard Class 3 (8), Packing Group II for transport.
How can I request a quote or sample for Ethenesulfonyl fluoride?
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To request a quote or a sample, please contact our sales team through the website or by calling us directly. We are happy to assist with your requirements.
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