Description

4-Chloro-3-Chlorosulfonylbenzoic Acid is a high-purity, multi-functional organic intermediate of significant commercial importance. Its unique structure, featuring both a carboxylic acid and a reactive sulfonyl chloride group, makes it a versatile building block for synthesizing more complex molecules. This compound is essential for manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries seeking to develop advanced active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of sulfonamide-based active pharmaceutical ingredients (APIs), including diuretics and carbonic anhydrase inhibitors.
• Agrochemical Synthesis: Used in the production of modern herbicides and fungicides, where the sulfonyl moiety contributes to biological activity.
• Dyestuff and Pigment Manufacturing: Serves as a building block for creating sulfonated azo dyes and high-performance pigments with enhanced properties.
• Polymer Modification: Employed to introduce sulfonyl chloride functional groups into polymer chains for subsequent cross-linking or to impart specific chemical reactivity.
• Chemical Research & Development: A valuable reagent in organic synthesis for constructing complex benzoic acid derivatives and exploring new chemical entities.
• Liquid Crystal & Electronic Material Precursor: Used in the synthesis of specialized organic compounds for advanced material applications.

Basic Information

Product Name	4-Chloro-3-Chlorosulfonylbenzoic Acid
CAS No.	2494-79-3
Molecular Formula	C7H4Cl2O4S
Molecular Weight	255.08 g/mol
Synonyms	3-Chlorosulfonyl-4-chlorobenzoic Acid; 4-Chloro-3-chlorosulphonylbenzoic Acid; Benzoic acid, 4-chloro-3-(chlorosulfonyl)-; 4-Chloro-3-sulfonylchloride-benzoic Acid; 2-Chlorosulfonyl-5-chlorobenzoic Acid; 5-Chloro-2-(chlorosulfonyl)benzoic Acid; 4-Chloro-3-(chlorosulfonyl)benzoic Acid
EINECS	219-690-6

Quality Control

Every batch of 4-Chloro-3-Chlorosulfonylbenzoic Acid is manufactured and tested under a strict quality management system. We provide comprehensive analytical data to ensure the product meets your specific requirements for purity and consistency. A detailed Certificate of Analysis (COA), including results for assay, identity, and impurity profiles, is supplied with each shipment and is available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent degradation from atmospheric moisture. Keep away from incompatible materials such as 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
Loss on Drying	≤ 1.0%
Related Substances (HPLC)	Contact for details

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