Description

3-(Chlorosulfonyl)Benzenesulfonic Acid Phenyl Ester is a specialized aromatic sulfonyl chloride derivative, serving as a high-value chemical intermediate. Its core value proposition lies in its dual reactive sites, which enable precise functionalization and the synthesis of complex molecules. This compound is essential for R&D chemists and process engineers in the pharmaceutical, agrochemical, and advanced materials sectors seeking to develop novel sulfonamide-based active ingredients or functional polymers.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of sulfonamide drugs, including diuretics, carbonic anhydrase inhibitors, and antiviral agents.
• Agrochemical Synthesis: Used in creating novel herbicides, fungicides, and plant growth regulators that require a sulfonyl moiety for bioactivity.
• Polymer Modification: Acts as a functional monomer or cross-linking agent to introduce sulfonate groups into polymers, enhancing properties like hydrophilicity or ion-exchange capacity.
• Dye and Pigment Manufacturing: Intermediate in the production of sulfonated dyes and organic pigments, improving solubility and color fastness.
• Liquid Crystal & OLED Materials: Used in the synthesis of advanced electronic materials where specific sulfone-based architectures are required.
• Chemical Research (R&D): A versatile reagent for exploring new reaction pathways and creating custom sulfonated compounds in laboratory settings.

Basic Information

Product Name	3-(Chlorosulfonyl)Benzenesulfonic Acid Phenyl Ester
CAS No.	71042-78-9
Molecular Formula	C12H9ClO5S2
Molecular Weight	332.78 g/mol
Synonyms	Phenyl 3-(Chlorosulfonyl)benzenesulfonate; 3-(Chlorosulfonyl)phenyl benzenesulfonate; Benzenesulfonic acid, 3-(chlorosulfonyl)-, phenyl ester; m-(Chlorosulfonyl)benzenesulfonic Acid Phenyl Ester; 3-Chlorosulfonylphenyl benzenesulfonate; NSC 403119
EINECS	Contact for details

Quality Control

Our 3-(Chlorosulfonyl)Benzenesulfonic Acid Phenyl Ester is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via FT-IR and NMR, to ensure it meets precise customer specifications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, 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, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature and reactivity as a strong acid/organic solvent derivative, the container must be kept tightly sealed under anhydrous conditions and separated from bases, amines, and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%

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