Description

2-Chloro-Benzenesulfonic Acid is a versatile aromatic sulfonic acid derivative, serving as a key building block and intermediate in advanced organic synthesis. Its value lies in the reactive sulfonyl chloride group, which can be readily converted, and the chloro substituent, which offers a site for further functionalization. This compound is essential for manufacturers in the agrochemical, pharmaceutical, and specialty chemical industries seeking to synthesize complex molecules for active ingredients, dyes, and polymer modifiers.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs), particularly those requiring a benzenesulfonamide or sulfonate ester moiety.
• Agrochemical Synthesis: Acts as a precursor for herbicides, fungicides, and plant growth regulators where the chlorobenzene core is integral to biological activity.
• Dye and Pigment Manufacturing: Serves as an intermediate in the production of sulfonated azo dyes and other colorants, enhancing water solubility and fiber affinity.
• Polymer Modification: Employed to introduce sulfonic acid groups into polymers, which can impart properties like ion-exchange capacity or improved hydrophilicity.
• Chemical Research & Development: A valuable reagent in organic chemistry labs for constructing complex molecular architectures and studying reaction mechanisms.
• Surfactant and Detergent Intermediate: Can be used to synthesize specialized anionic surfactants for industrial and institutional cleaning formulations.

Basic Information

Product Name	2-Chloro-Benzenesulfonic Acid
CAS No.	27886-58-4
Molecular Formula	C6H5ClO3S
Molecular Weight	192.62 g/mol
Synonyms	o-Chlorobenzenesulfonic Acid; 2-Chlorobenzenesulphonic Acid; Benzenesulfonic acid, 2-chloro-; o-Chlorophenylsulfonic Acid; 1-Chloro-2-sulfobenzene; 2-Chlorophenylsulfonic Acid; (2-Chlorophenyl)sulfonic Acid; 2-CBSA
EINECS	Contact for details

Quality Control

Our 2-Chloro-Benzenesulfonic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and impurity profiles. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing results from methods such as HPLC, titration, and loss on drying. Our quality commitment supports compliance with cGMP and ISO 9001 standards where required by our B2B partners.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed when not in use to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Melting Point	Contact for details
Heavy Metals	< 20 ppm

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