Description

1,2-Benzenedisulfonyl Dichloride is a versatile and highly reactive chemical intermediate, primarily valued for its dual sulfonyl chloride functional groups. This reactivity makes it a critical building block for synthesizing complex sulfonamides, sulfonate esters, and other functionalized aromatic compounds. It is essential for R&D chemists and production specialists in the pharmaceutical, agrochemical, and specialty polymer industries who require precise and reliable sulfonylation agents.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for drugs containing sulfonamide moieties.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and other crop protection agents that incorporate sulfonyl-based structures.
• Polymer & Dye Manufacturing: Serves as a monomer or cross-linking agent for creating specialty polymers, resins, and high-performance dyes.
• Chemical Research & Development: A valuable reagent for organic synthesis, enabling the introduction of sulfonyl groups into complex molecular architectures.
• Ligand & Catalyst Preparation: Used to synthesize specialized ligands for metal complexes and catalysts used in fine chemical processes.

Basic Information

Product Name	1,2-Benzenedisulfonyl Dichloride
CAS No.	6461-76-3
Molecular Formula	C6H4Cl2O4S2
Molecular Weight	275.13 g/mol
Synonyms	Benzene-1,2-disulfonyl dichloride; o-Benzenedisulfonyl Dichloride; 1,2-Benzenedisulfonic Acid Dichloride; o-Disulfonylbenzene Dichloride; Benzene-o-disulfonyl Chloride; NSC 403119; 1,2-Bis(chlorosulfonyl)benzene; Benzene-1,2-di(sulfonyl chloride)
EINECS	229-265-7

Quality Control

Our 1,2-Benzenedisulfonyl Dichloride is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including assay, purity profiling, and identification, to ensure it meets the high standards required for advanced synthetic applications. A detailed Certificate of Analysis (COA) is provided with every shipment to guarantee traceability, consistency, and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept under anhydrous conditions to prevent hydrolysis. Keep away from strong bases, amines, and alcohols.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Water Content (KF)	≤ 0.5%

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