Description

3-Chloro-5-(Chlorosulfonyl)-4-Hydroxybenzoic Acid is a specialized, high-value organic intermediate featuring both a chlorosulfonyl and a carboxylic acid functional group on a chlorinated phenolic ring. This unique bifunctional structure makes it a critical building block for synthesizing complex molecules, particularly in the pharmaceutical and agrochemical sectors. It is primarily sought after by R&D chemists and process development scientists for the production of active pharmaceutical ingredients (APIs), advanced crop protection agents, and functional dyes.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of sulfonamide-based drugs and other active pharmaceutical ingredients (APIs).
• Agrochemical Synthesis: Used in the manufacture of advanced herbicides, fungicides, and insecticides, leveraging its reactive chlorosulfonyl group.
• Dye and Pigment Manufacturing: Serves as a building block for producing high-performance, sulfonated azo dyes and pigments.
• Polymer Chemistry: Can be incorporated as a monomer or cross-linking agent to create specialty polymers with specific functional properties.
• Chemical Research & Development: Employed in academic and industrial R&D for exploring new synthetic pathways and creating novel chemical entities.
• Liquid Crystal & Electronic Materials: Potential intermediate for synthesizing components used in advanced material science applications.

Basic Information

Product Name	3-Chloro-5-(Chlorosulfonyl)-4-Hydroxybenzoic Acid
CAS No.	1201663-81-1
Molecular Formula	C7H4Cl2O5S
Molecular Weight	271.08 g/mol
Synonyms	4-Hydroxy-3-chloro-5-(chlorosulfonyl)benzoic acid; 3-Chloro-4-hydroxy-5-sulfonylchloridebenzoic acid; Benzoic acid, 3-chloro-5-(chlorosulfonyl)-4-hydroxy-; 3-Chloro-5-chlorosulfonyl-4-hydroxybenzoic acid; 5-(Chlorosulfonyl)-3-chloro-4-hydroxybenzoic acid
EINECS	Contact for details

Quality Control

Our production of 3-Chloro-5-(Chlorosulfonyl)-4-Hydroxybenzoic Acid adheres to stringent in-process controls and final batch testing to ensure consistent purity and performance. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, impurity profile, and identity confirmation. Our quality management system is designed to support cGMP and ISO standards for traceability and reliability, making it suitable for demanding industrial and research applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive) and should be handled under dry conditions to prevent degradation. Keep away from strong bases and incompatible materials.

Specification

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