Description

3-Chloro-4-Methylbenzenesulfonyl Chloride is a versatile and high-purity sulfonyl chloride derivative, serving as a critical building block in advanced organic synthesis. Its primary value lies in its dual reactive sites, enabling its use as a key intermediate for constructing complex molecules with tailored properties. This compound is essential for R&D and production chemists in the pharmaceutical, agrochemical, and specialty chemical industries, where it is used to introduce sulfonamide or sulfonate functionalities.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for sulfonamide-based drugs.
• Agrochemical Synthesis: Used in manufacturing herbicides, fungicides, and plant growth regulators.
• Dye and Pigment Production: Acts as an intermediate for creating sulfonated dyes and colorants.
• Polymer Chemistry: Employed as a monomer or cross-linking agent for producing specialty polymers and resins.
• Chemical Research: Valuable reagent in organic synthesis for introducing the sulfonyl chloride group.
• Liquid Crystal & Electronic Materials: Intermediate in the production of advanced materials for display and semiconductor applications.

Basic Information

Product Name	3-Chloro-4-Methylbenzenesulfonyl Chloride
CAS No.	42413-03-6
Molecular Formula	C7H6Cl2O2S
Molecular Weight	225.09 g/mol
Synonyms	4-Methyl-3-chlorobenzenesulfonyl chloride; 3-Chloro-p-toluenesulfonyl chloride; 3-Chloro-4-methylbenzene-1-sulfonyl chloride; 2-Chloro-4-(chlorosulfonyl)toluene; 3-Chloro-4-methylbenzenesulphonyl chloride; 3-Chloro-4-methylphenylsulfonyl chloride; p-Toluenesulfonyl chloride, 3-chloro-; 42413-03-6
EINECS	Contact for details

Quality Control

Our 3-Chloro-4-Methylbenzenesulfonyl Chloride is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC, GC, and NMR, to ensure high chemical purity and consistency. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with every shipment to support your quality assurance protocols.

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 and moisture-sensitive nature, the container must be kept tightly sealed under dry conditions to prevent hydrolysis. Keep away from strong bases, oxidizing agents, and sources of ignition.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or lumps
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	64 - 68 °C
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%

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