Description

3,4-Dichlorobenzenesulfonyl Chloride is a versatile and highly reactive chemical intermediate essential for advanced organic synthesis. Its core value lies in its dual functionality as a sulfonylating and arylating agent, enabling the construction of complex molecules with precision. This compound is critically needed by research and development laboratories, agrochemical manufacturers, and pharmaceutical companies for creating novel active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of sulfonamide-based drugs, including diuretics, carbonic anhydrase inhibitors, and antiviral agents.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and pesticides, where the dichloro-substituted aromatic ring provides biological activity.
• Dyestuff and Pigment Manufacturing: Serves as a precursor for sulfonated azo dyes and other specialty colorants.
• Polymer Modification: Employed to introduce sulfonyl chloride groups into polymer chains for creating ion-exchange resins or materials with specific surface properties.
• Chemical Research & Development: A valuable reagent for synthesizing sulfonates, sulfonamides, and sulfonic esters in academic and industrial R&D settings.
• Ligand and Catalyst Preparation: Used to create specialized ligands for metal complexes and catalysts used in cross-coupling reactions.

Basic Information

Product Name	3,4-Dichlorobenzenesulfonyl Chloride
CAS No.	98-31-7
Molecular Formula	C6H3Cl3O2S
Molecular Weight	245.51 g/mol
Synonyms	3,4-Dichlorobenzene-1-sulfonyl chloride; 3,4-Dichlorophenylsulfonyl chloride; 1,2-Dichloro-4-(chlorosulfonyl)benzene; Benzenesulfonyl chloride, 3,4-dichloro-; DCBSC; 3,4-DCBSCl
EINECS	202-653-3

Quality Control

Our 3,4-Dichlorobenzenesulfonyl Chloride is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation by FT-IR and NMR, to ensure it meets precise customer specifications and industry standards. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment and is available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and reacts with water and strong bases. Keep the container tightly sealed under an inert atmosphere (e.g., nitrogen or argon) for long-term storage to prevent hydrolysis and degradation. Isolate from incompatible materials such as strong oxidizers, bases, and alcohols.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or lumps
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Purity (GC)	≥ 97.0%
Melting Point	40 - 44 °C
Water Content (KF)	≤ 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.