Description

Methanesulfinylchloride is a versatile and highly reactive organosulfur compound, also known as methanesulfonic acid chloride. This chemical serves as a critical sulfonylation and chlorination reagent in advanced organic synthesis, enabling the efficient construction of complex molecular architectures. It is essential for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries who require a reliable building block for creating sulfonamides, sulfonate esters, and other functionalized intermediates.

Application

• Pharmaceutical Intermediate Synthesis: A key reagent for the preparation of sulfonamide drugs, including protease inhibitors and antibacterial agents.
• Agrochemical Production: Used in the synthesis of herbicides, fungicides, and plant growth regulators that contain sulfonyl groups.
• Polymer Chemistry: Acts as a modifying agent or initiator in the production of specialty polymers and functional materials.
• Dye and Pigment Manufacturing: Employed in the synthesis of sulfonated dyes and colorants.
• Organic Synthesis Reagent: Facilitates sulfonylation, chlorination, and dehydration reactions in complex multi-step laboratory and industrial processes.
• Chemical Research & Development: A valuable tool for medicinal chemists and process chemists exploring new synthetic routes and novel compounds.

Basic Information

Product Name	Methanesulfinylchloride
CAS No.	676-85-7
Molecular Formula	CH3ClO2S
Molecular Weight	114.55 g/mol
Synonyms	Methanesulfonyl chloride; Mesyl chloride; Methylsulfonyl chloride; Methanesulphonic acid chloride; MSC; Methanesulfonic acid chloride; Mesylchloride; Methylsulphonyl chloride
EINECS	211-639-2

Quality Control

Our Methanesulfinylchloride is produced and tested under stringent quality management protocols to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) for every shipment, detailing key parameters such as assay, identity, and impurity profiles. Our quality systems are designed to meet the rigorous demands of GMP and ISO standards where applicable, supporting our commitment to supply reliability for critical B2B applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases, amines, and alcohols. Due to its hygroscopic and reactive nature, it is recommended to handle under an inert atmosphere (e.g., nitrogen or argon) for extended storage and to minimize moisture uptake. Typical storage temperature is 2-8°C for long-term stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Density (at 20°C)	1.480 - 1.485 g/mL
Refractive Index (n20D)	1.451 - 1.453

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