Description

5-(Chlorosulfonyl)Pentanoic Acid Methyl Ester is a versatile bifunctional organic intermediate featuring both a reactive chlorosulfonyl group and an ester moiety. This compound is valued for its role as a key building block in the synthesis of more complex molecules, particularly in pharmaceutical and agrochemical research. It is primarily sought by R&D chemists and process development scientists working on sulfonamide-based active ingredients and specialty polymers.

Application

• Pharmaceutical Intermediate: A critical precursor in the synthesis of novel sulfonamide drugs, including enzyme inhibitors and receptor antagonists.
• Agrochemical Synthesis: Used in the development of new herbicides, fungicides, and insecticides that incorporate sulfonylurea or sulfonamide functionalities.
• Polymer Modification: Serves as a functional monomer or cross-linking agent to introduce sulfonyl chloride groups into polymer backbones for specialty materials.
• Chemical Biology & Proteomics: Employed as a reactive handle for bioconjugation and the development of activity-based probes targeting specific enzymes.
• Liquid Crystal & OLED Materials: Used in the synthesis of advanced organic electronic materials requiring specific polar and mesogenic units.
• Custom Synthesis & Contract Manufacturing: A key starting material for custom synthesis projects and scale-up processes in fine chemical production.

Basic Information

Product Name	5-(Chlorosulfonyl)Pentanoic Acid Methyl Ester
CAS No.	1408058-14-9
Molecular Formula	C6H11ClO4S
Molecular Weight	214.67 g/mol
Synonyms	Methyl 5-(chlorosulfonyl)pentanoate; Methyl 5-chlorosulfonylpentanoate; Pentanoic acid, 5-(chlorosulfonyl)-, methyl ester; 5-Chlorosulfonylpentanoic acid methyl ester
EINECS	Contact for details

Quality Control

Our 5-(Chlorosulfonyl)Pentanoic Acid Methyl Ester is produced under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation by NMR and IR spectroscopy, to ensure it meets the high standards required for research and development. Certificates of Analysis (COA) with lot-specific data are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at 2-8°C (refrigerated) or as specified on the label or COA. This material is hygroscopic (moisture-sensitive) and should be handled under a dry inert atmosphere to prevent decomposition.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Water Content (KF)	≤ 0.5%

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