Description

(3,4-Dichloro-Phenyl)-Methanesulfonyl Chloride CAS NO 85952-30-3 is a high-purity, reactive sulfonyl chloride derivative used as a critical building block in advanced organic synthesis. Its primary value lies in its ability to introduce the methanesulfonyl (mesyl) group into target molecules, enabling the development of novel compounds with specific functionalities. This intermediate is essential for researchers and manufacturers in the pharmaceutical and agrochemical industries, particularly for the development of active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of active pharmaceutical ingredients (APIs), especially in the development of sulfonamide-based drugs.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and insecticides where the sulfonyl moiety is a critical functional group.
• Material Science Research: Serves as a precursor for creating specialized polymers, liquid crystals, or other advanced materials with tailored properties.
• Chemical Biology & Proteomics: Utilized as a reactive handle for bioconjugation, labeling biomolecules, or developing activity-based probes.
• Custom Synthesis & Contract Manufacturing: A vital reagent for custom synthesis houses and CDMOs (Contract Development and Manufacturing Organizations) producing complex, client-specific molecules.

Basic Information

Product Name	(3,4-Dichloro-Phenyl)-Methanesulfonyl Chloride
CAS No.	85952-30-3
Molecular Formula	C7H5Cl3O2S
Molecular Weight	259.54 g/mol
Synonyms	3,4-Dichlorophenylmethanesulfonyl chloride; 1-(Chlorosulfonyl)-2-(3,4-dichlorophenyl)ethane; (3,4-Dichlorobenzyl)sulfonyl chloride; Methanesulfonyl chloride, (3,4-dichlorophenyl)-; 85952-30-3; 3,4-DCPMSC
EINECS	Contact for details

Quality Control

Our (3,4-Dichloro-Phenyl)-Methanesulfonyl Chloride is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC, GC, and NMR, to ensure high purity and consistency. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and should be handled under anhydrous conditions to prevent decomposition. Keep away from heat, sparks, open flames, and incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
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.