Description

p-Chlorobenzenesulphinic Acid is a key organosulfur intermediate characterized by its sulfinic acid functional group and aromatic chlorine substituent. This compound matters for its role as a versatile building block in the synthesis of more complex sulfones, sulfonamides, and other sulfur-containing derivatives. It is primarily needed by manufacturers in the agrochemical and pharmaceutical industries for producing active ingredients, as well as by research and development laboratories exploring novel organic synthesis pathways.

Application

• Agrochemical Synthesis: A crucial precursor in the manufacture of herbicides, fungicides, and other crop protection agents.
• Pharmaceutical Intermediates: Used in the synthesis of active pharmaceutical ingredients (APIs), particularly those containing sulfone or sulfonamide moieties.
• Polymer & Material Science: Serves as a monomer or modifier in the production of specialty polymers and high-performance materials.
• Dyestuff & Pigment Manufacturing: Acts as an intermediate in the synthesis of certain sulfur-based dyes and organic pigments.
• Chemical Research & Development: Employed as a reagent in organic synthesis for constructing C-S bonds and exploring new reaction methodologies.
• Cross-Coupling Reactions: Utilized in palladium-catalyzed coupling reactions to introduce the sulfinyl or sulfonyl group into target molecules.

Basic Information

Product Name	p-Chlorobenzenesulphinic Acid
CAS No.	100-03-8
Molecular Formula	C6H5ClO2S
Molecular Weight	176.62 g/mol
Synonyms	4-Chlorobenzenesulfinic Acid; p-Chlorophenylsulfinic Acid; Benzenesulfinic Acid, 4-chloro-; 4-Chlorobenzene-1-sulfinic Acid; 4-Chlorophenylsulfinic Acid; (4-Chlorophenyl)sulfinic Acid; 100-03-8; p-Chlorobenzene sulfinic acid
EINECS	202-810-7

Quality Control

Our p-Chlorobenzenesulphinic Acid is manufactured under strict quality management protocols. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. We provide comprehensive Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and physical characteristics. Our quality commitment aligns with cGMP principles for industrial intermediates, ensuring reliable performance in your synthesis processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). This product is easily oxidized and should be handled and stored under an inert atmosphere (e.g., nitrogen or argon) to maintain stability and prevent degradation. Keep away from strong 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	≤ 1.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Heavy Metals	≤ 20 ppm

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