Description

Benzenesulfonyl Chloride CAS NO 98-09-9 is a versatile and highly reactive organosulfur compound, serving as a critical sulfonating and sulfonylating agent in organic synthesis. Its primary value lies in its ability to introduce the benzenesulfonyl group, a key moiety for modifying chemical properties and creating functional intermediates. This essential reagent is widely needed by manufacturers in the pharmaceutical, agrochemical, dye, and polymer industries for producing sulfonamides, sulfonate esters, and other specialty chemicals.

Application

• Pharmaceutical Intermediate: Key building block for synthesizing a wide range of sulfonamide drugs, including diuretics, antibacterial agents, and protease inhibitors.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and plant growth regulators that contain sulfonylurea or sulfonamide structures.
• Dye and Pigment Manufacturing: Acts as a sulfonating agent to create water-soluble dyes and to modify the properties of colorants.
• Polymer Chemistry: Employed in the synthesis of sulfonated polymers, ion-exchange resins, and as a modifier for polymer chains.
• Chemical Research & Development: A fundamental reagent for protecting groups (e.g., for amines) and for probing chemical reactivity in academic and industrial R&D labs.
• Fine Chemical Production: Integral to manufacturing specialty chemicals, flavors, fragrances, and performance materials requiring sulfonyl functionality.

Basic Information

Product Name	Benzenesulfonyl Chloride
CAS No.	98-09-9
Molecular Formula	C6H5ClO2S
Molecular Weight	176.62 g/mol
Synonyms	Benzenesulfonyl chloride; Benzenesulphonyl chloride; Benzene-1-sulfonyl chloride; Phenylsulfonyl chloride; BSC; Benzenesulfonic acid chloride; NSC 9764; BzCl
EINECS	202-636-6

Quality Control

Our Benzenesulfonyl Chloride is produced under stringent quality management systems. Every batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the exacting standards required for synthesis and industrial applications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat and incompatible materials. Due to its hygroscopic and moisture-sensitive nature, containers must be kept tightly sealed to prevent decomposition from atmospheric moisture. Recommended storage temperature is 2-8°C for extended stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Free Acid (as H2SO4)	≤ 1.0%

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