2-Chlorobenzenesulfonyl chloride
2-Chlorobenzenesulfonyl chloride (CAS: 2905-23-9, Formula: ClC6H4SO2Cl) is a key organic compound with a molecular weight of 211.07 g/mol. This sulfonyl halide serves as a valuable building block in chemical synthesis, particularly in organic chemistry research and development. Its reactivity makes it useful for introducing the 2-chlorobenzenesulfonyl group into various molecules. It is supplied by Tech Serve Solutions with an assay of 97%.

Organic Synthesis Reagent
2-Chlorobenzenesulfonyl chloride is employed as an intermediate and reagent in the synthesis of more complex organic molecules. Its utility lies in its ability to undergo reactions typical of sulfonyl chlorides, facilitating the construction of diverse chemical structures.
Pharmaceutical Intermediate
This compound can function as a precursor or intermediate in the multi-step synthesis of active pharmaceutical ingredients (APIs). Its specific structure allows for targeted modifications in drug discovery and development processes.
Research and Development
Utilised in laboratory settings for exploring new synthetic pathways and developing novel chemical entities. Its availability as a fine chemical supports academic and industrial research initiatives.
| Molecular weight | 211.07 |
|---|---|
| Linear formula | ClC6H4SO2Cl |
| Assay | 97% |
| Boiling point | 150-152 °C/12 mmHg(lit.) |
| Density | 1.548 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.576(lit.) |


Hazard statements
- H226Flammable liquid and vapour
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 60 °C / 140 °F |
| Transport (UN / ADR) | UN 2920 3(8) / PGII |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34 |
| 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 2-Chlorobenzenesulfonyl chloride used for?
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2-Chlorobenzenesulfonyl chloride is primarily used as a building block in organic synthesis and as an intermediate in the development of pharmaceuticals and other complex organic molecules.
What is the CAS number and chemical formula for 2-Chlorobenzenesulfonyl chloride?
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The CAS number is 2905-23-9 and the chemical formula is ClC6H4SO2Cl.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2-Chlorobenzenesulfonyl chloride with an assay of 97%. We do not represent this product as USP, BP, EP, or pharmacopoeia grade.
How should 2-Chlorobenzenesulfonyl chloride be handled?
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2-Chlorobenzenesulfonyl chloride is classified as Danger (GHS02, GHS05) with hazard statements H226-H314. It is flammable and causes severe skin burns and eye damage. Handling requires appropriate personal protective equipment, including full-face respirators, gloves, and goggles, in a well-ventilated area. Strict adherence to safety guidelines is essential.
How is 2-Chlorobenzenesulfonyl chloride packed and shipped?
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2-Chlorobenzenesulfonyl chloride is shipped as a hazardous material (UN 2920 3(8) / PGII). Packaging adheres to international regulations for transporting dangerous goods, suitable for global export.
How can I request a sample or quote for 2-Chlorobenzenesulfonyl chloride?
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To request a sample or quote, please use the contact form on the Tech Serve Solutions website or contact our sales department directly with your inquiry.
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