Description

m-(Chlorocarbonyl)Benzenesulphonic Acid is a key bifunctional aromatic intermediate that combines a highly reactive acid chloride group with a strong sulfonic acid moiety. This dual functionality makes it a versatile building block for the synthesis of more complex molecules, particularly dyes, pigments, and specialty surfactants. It is primarily sought after by manufacturers in the fine chemical, agrochemical, and pharmaceutical industries for creating sulfonamide derivatives and other performance chemicals.

Application

• Dye and Pigment Intermediate: A crucial precursor in the synthesis of acid dyes, reactive dyes, and organic pigments, providing sulfonic acid groups for water solubility and ionic character.
• Agrochemical Synthesis: Used in the production of sulfonamide-based herbicides and fungicides, where it acts as a key aromatic backbone.
• Pharmaceutical Building Block: Serves as an intermediate in the manufacture of certain active pharmaceutical ingredients (APIs), particularly those containing benzenesulfonamide groups.
• Surfactant and Detergent Chemical: Employed in the synthesis of specialized anionic surfactants and hydrotropes for industrial and institutional cleaning formulations.
• Polymer Modification: Can be used to introduce sulfonic acid functionality into polymers, potentially enhancing properties like hydrophilicity or ion-exchange capacity.
• Chemical Research & Development: A valuable reagent in organic synthesis labs for creating novel sulfonated compounds and exploring new reaction pathways.

Basic Information

Item	Detail
Product Name	m-(Chlorocarbonyl)Benzenesulphonic Acid
CAS No.	58261-80-6
Molecular Formula	C7H5ClO4S
Molecular Weight	220.63 g/mol
Synonyms	3-(Chlorocarbonyl)benzenesulfonic acid; m-Carboxybenzenesulfonyl chloride; 3-Sulfobenzoic acid chloride; Benzoic acid, 3-sulfo-, chloride; Meta-sulfobenzoic acid chloride; 3-Chlorosulfonylbenzoic acid; NSC 163081
EINECS	Contact for details

Quality Control

Every batch of m-(Chlorocarbonyl)Benzenesulphonic Acid is produced and tested under a strict quality management system. We ensure compliance with relevant industry standards through rigorous analytical controls. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to guarantee batch-to-batch consistency and traceability for our B2B partners.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area. Due to its hygroscopic (moisture-sensitive) nature and strong acid properties, the container must be kept sealed under dry conditions and away from incompatible materials such as bases and active metals. Recommended storage temperature is 2-8°C for extended stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Melting Point	Contact for details

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