4,5-Dichlorothiophene-2-sulfonyl chloride
Tech Serve Solutions supplies 4,5-Dichlorothiophene-2-sulfonyl chloride (CAS: 126714-85-0), a key organosulfur compound with the empirical formula C4HCl3O2S2 and a molecular weight of 251.54 g/mol. This halogenated thiophene derivative serves as a valuable building block in organic synthesis. Its reactivity makes it suitable for the introduction of the 4,5-dichlorothiophene-2-sulfonyl moiety into more complex molecular architectures, finding utility in the development of novel chemical entities.
- Synonyms
- C4HCl3O2S2

Organic Synthesis Intermediate
4,5-Dichlorothiophene-2-sulfonyl chloride is utilised as a reactive intermediate in the synthesis of complex organic molecules. It enables the incorporation of a substituted thiophene ring system into target compounds.
Heterocyclic Chemistry
As a halogenated heterocyclic building block, this compound is employed in the construction of diverse heterocyclic frameworks. It is particularly useful for creating molecules containing the thiophene scaffold.
Research and Development
This sulfonyl chloride is a useful reagent in academic and industrial research laboratories for exploring new synthetic routes and developing novel chemical structures. Its specific substitution pattern offers unique reactivity.
| Molecular weight | 251.54 |
|---|---|
| Empirical formula | C4HCl3O2S2 |
| Assay | 97% |
| Storage temperature | 2-8°C |
| Melting point | 54-58 °C(lit.) |

Hazard statements
- 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 | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 3261 8 / PGII |
| Water hazard class (WGK, DE) | 3 |
| 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 4,5-Dichlorothiophene-2-sulfonyl chloride used for?
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4,5-Dichlorothiophene-2-sulfonyl chloride is used as a building block and intermediate in organic synthesis, particularly in the development of novel chemical entities and the construction of heterocyclic frameworks.
What is the CAS number and formula for 4,5-Dichlorothiophene-2-sulfonyl chloride?
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The CAS number is 126714-85-0 and the empirical formula is C4HCl3O2S2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4,5-Dichlorothiophene-2-sulfonyl chloride with a purity of 97%. We do not represent this product as USP, BP, or EP grade.
How should 4,5-Dichlorothiophene-2-sulfonyl chloride be handled?
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This compound is classified as Danger with hazard statement H314, indicating it causes severe skin burns and eye damage. Appropriate personal protective equipment, including eyeshields, face shields, gloves, and respiratory protection (type N100 US or P3 EN143), must be worn during handling. Ensure adequate ventilation and follow strict safety protocols.
How is 4,5-Dichlorothiophene-2-sulfonyl chloride packed and shipped?
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4,5-Dichlorothiophene-2-sulfonyl chloride is shipped as UN 3261, Class 8, Packing Group II. TSS exports fine chemicals globally, adhering to all relevant transport regulations.
How can I request a sample or quote for 4,5-Dichlorothiophene-2-sulfonyl chloride?
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To request a sample or a quote, please contact our sales team through the website or by phone, providing your details and the product's CAS number (126714-85-0).
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