Description

5-Chloro-2,4-difluorobenzenesulphonyl chloride (CAS: 13656-57-0) is a high-purity sulfonyl chloride derivative widely utilized in pharmaceutical and agrochemical research. With the molecular formula C₆H₂Cl₂F₂O₂S, this compound serves as a critical intermediate in the synthesis of sulfonamides and other bioactive molecules. Its reactive sulfonyl chloride group enables efficient functionalization, making it indispensable for medicinal chemistry and material science applications. Supplied as a crystalline solid with ≥97% purity, it is rigorously tested for consistency and stability. Ideal for lab-scale and industrial-scale synthesis, this reagent is packaged under inert conditions to ensure long-term integrity.

Properties

• CAS Number: 13656-57-0
• Complexity: 277
• IUPAC Name: 5-chloro-2,4-difluoro-benzenesulfonyl chloride
• InChI: InChI=1S/C6H2Cl2F2O2S/c7-3-1-6(13(8,11)12)5(10)2-4(3)9/h1-2H
• InChI Key: XMNXVDULKLCZFG-UHFFFAOYSA-N
• Exact Mass: 245.9120622
• Molecular Formula: C6H2Cl2F2O2S
• Molecular Weight: 247.05
• SMILES: C1=C(C(=CC(=C1F)Cl)S(=O)(=O)Cl)F
• Topological: 42.5
• Monoisotopic Mass: 245.9120622
• Synonyms: 5-chloro-2,4-difluorobenzenesulfonyl chloride, 5-chloro-2,4-difluorobenzenesulphonyl chloride, 638-922-6, 13656-57-0, 5-Chloro-2,4-difluorobenzenesulfonylchloride, 5-CHLORO-2,4-DIFLUOROBENZENE-1-SULFONYL CHLORIDE, Benzenesulfonyl chloride, 5-chloro-2,4-difluoro-, MFCD01940426, chloro(5-chloro-2,4-difluorophenyl)sulfone, 5-chloro-2,4-difluoro-benzenesulfonyl Chloride, SCHEMBL320432, DTXSID70378526, XMNXVDULKLCZFG-UHFFFAOYSA-N, BBL102942, SBB066466, STL556751, AKOS005063800, CS-W022344, GS-3483, SY021830, DB-042348, 2,4-difluoro-5-chlorobenzenesulfonyl chloride, 3-chloro-4,6-difluorobenzenesulfonyl chloride, EN300-7360831, 5-Chloro-2,4-difluorobenzenesulfonyl chloride, 97%, A1-00334, 5-Chloro-2 pound not4-difluorobenzenesulfonylchloride, 5-chloro-2,4-difluorobenzenesulfonyl chloride, AldrichCPR

5-Chloro-2,4-difluorobenzenesulphonyl chloride is primarily employed as a versatile building block in the synthesis of sulfonamide-based pharmaceuticals and agrochemicals. Its reactivity facilitates the introduction of sulfonyl groups into heterocyclic scaffolds, enhancing drug discovery efforts. Researchers also leverage it in cross-coupling reactions and polymer chemistry. Strict handling under anhydrous conditions is recommended due to its moisture sensitivity.

Safety and Hazards

GHS Hazard Statements

• H314 (100%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
• H335 (33.3%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]

Precautionary Statements

• P260, P261, P264, P271, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P319, P321, P363, P403+P233, P405, and P501

Hazard Classes and Categories

• Skin Corr. 1B (100%)
• STOT SE 3 (33.3%)

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