Description

Cyclopentyl-Methanesulfonyl Chloride is a versatile and highly reactive organosulfur intermediate, primarily used as a key building block in advanced organic synthesis. Its core value lies in its ability to act as a sulfonylating agent, facilitating the introduction of the cyclopentylmethanesulfonyl group into target molecules. This compound is essential for research chemists and process development scientists in the pharmaceutical, agrochemical, and specialty chemical industries who are developing new active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A critical reagent in the synthesis of novel drug candidates, particularly for creating sulfonamide-based molecules with potential therapeutic activity.
• Agrochemical Synthesis: Used in the development of new herbicides, fungicides, and insecticides where the sulfonyl moiety is a key functional group.
• Material Science Research: Serves as a precursor for modifying polymer surfaces or creating specialized monomers with sulfone linkages.
• Chemical Biology Probes: Employed in the design and synthesis of activity-based probes for studying enzyme function and protein labeling.
• Process Chemistry: Utilized in scale-up and optimization of synthetic routes for commercial production of fine chemicals.
• Custom Synthesis & Contract Manufacturing: A fundamental starting material for CDMOs (Contract Development and Manufacturing Organizations) offering bespoke chemical services.

Basic Information

Product Name	Cyclopentyl-Methanesulfonyl Chloride
CAS No.	242459-85-4
Molecular Formula	C7H13ClO2S
Molecular Weight	196.69 g/mol
Synonyms	Cyclopentylmethanesulfonyl chloride; Cyclopentylmethylsulfonyl chloride; (Cyclopentylmethyl)sulfonyl chloride; Methanesulfonyl chloride, cyclopentyl-; Cyclopentylmethanesulphonyl chloride; Cyclopentyl methyl sulfone chloride; CPMS-Cl; Cyclopentylmethane sulfonyl chloride
EINECS	Contact for details

Quality Control

Our Cyclopentyl-Methanesulfonyl Chloride is manufactured under strict quality management protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including chromatography and spectroscopic methods, to verify identity and purity. A Certificate of Analysis (COA) detailing all specifications is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Due to its hygroscopic (moisture-sensitive) nature, store under an inert atmosphere (e.g., nitrogen or argon) in a cool, dry, and well-ventilated place. Recommended storage temperature is 2-8°C for long-term stability. Keep away from strong bases, oxidizing agents, and moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%

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