Description

3,5-Dichlorobenzenesulfonyl chloride (CAS No. 705-21-5) is a high-purity sulfonyl chloride derivative widely utilized in organic synthesis and pharmaceutical research. With the molecular formula C₆H₃Cl₃O₂S, this compound serves as a critical intermediate in the preparation of sulfonamides, sulfonate esters, and other functionalized aromatic compounds. Its reactive sulfonyl chloride group enables efficient nucleophilic substitution reactions, making it indispensable in medicinal chemistry and material science applications. Available in ≥97% purity, this product is rigorously tested for consistency and performance, ensuring reliable results for researchers and industrial scientists.

Properties

• CAS Number: 705-21-5
• Complexity: 236
• IUPAC Name: 3,5-dichlorobenzenesulfonyl chloride
• InChI: InChI=1S/C6H3Cl3O2S/c7-4-1-5(8)3-6(2-4)12(9,10)11/h1-3H
• InChI Key: RJSQINMKOSOUGT-UHFFFAOYSA-N
• Exact Mass: 243.891934
• Molecular Formula: C6H3Cl3O2S
• Molecular Weight: 245.5
• SMILES: C1=C(C=C(C=C1Cl)Cl)S(=O)(=O)Cl
• Topological: 42.5
• Monoisotopic Mass: 243.891934
• Synonyms: 3,5-Dichlorobenzenesulfonyl chloride, 705-21-5, RJSQINMKOSOUGT-UHFFFAOYSA-, DTXSID70334940, DTXCID00286029, 627-769-0, inchi=1/c6h3cl3o2s/c7-4-1-5(8)3-6(2-4)12(9,10)11/h1-3h, rjsqinmkosougt-uhfffaoysa-n, 3,5-Dichlorobenzene-1-Sulfonyl Chloride, 3,5-Dichlorobenzenesulphonyl chloride, 3,5-dichlorobenzenesulfonylchloride, 3,5-dichloro-benzenesulfonyl chloride, (3,5-dichlorophenyl)chlorosulfone, Benzenesulfonyl chloride, 3,5-dichloro-, 3,5-dichlorophenylsulfonyl chloride, MFCD00051698, SCHEMBL184464, 3,5-dichlorophenylsulfonylchloride, 3,5-Dichlorophenyl sulfonylchloride, 3,5-dichlorophenylsulphonyl chloride, SBB063775, 3,5-dichloro-phenylsulphonyl chloride, 3,5-dichlorobenzene sulfonyl chloride, 3,5-dichlorobenzene-sulfonyl chloride, 3,5-dichlorophenyl sulphonyl chloride, AKOS000264813, AB02136, CS-W012710, FD70187, 3,5-Dichlorobenzene-1-SulfonylChloride, AS-38660, 3,5-Dichlorobenzenesulfonyl chloride, 97%, DB-022028, A9296, D3503, ST50411810, EN300-06738, Z56931875

3,5-Dichlorobenzenesulfonyl chloride is primarily employed as a key reagent in the synthesis of sulfonamide-based pharmaceuticals and agrochemicals. It is also used in polymer chemistry to introduce sulfonyl functionalities into aromatic backbones. Researchers leverage its reactivity to develop novel sulfonate esters for catalytic and material science applications. Additionally, it serves as a precursor in the preparation of dyes and specialty chemicals.

Safety and Hazards

GHS Hazard Statements

• H314 (100%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]

Precautionary Statements

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

Hazard Classes and Categories

• Skin Corr. 1B (100%)

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