Description

1-Cyclopentyl-1H-Pyrazole-5-Sulfonyl Chloride is a specialized sulfonyl chloride derivative, a key reactive intermediate in modern organic synthesis. Its primary value lies in its role as a versatile building block for constructing sulfonamide linkages, which are critical pharmacophores in medicinal chemistry. This compound is essential for researchers and manufacturers in the pharmaceutical and agrochemical industries, particularly for the development of new active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: A crucial precursor in the synthesis of novel drug candidates, especially those targeting sulfonamide-based enzyme inhibitors.
• Agrochemical Synthesis: Used in the research and production of advanced herbicides, fungicides, and pesticides with sulfonamide functional groups.
• Chemical Biology Probes: Serves as a reactive handle for labeling proteins or modifying biomolecules in proteomics and bio-conjugation studies.
• Material Science Research: Employed in the development of specialty polymers and functional materials where sulfonamide incorporation is desired.
• Custom Synthesis & Contract Manufacturing: A valuable starting material for custom synthesis houses and CDMOs (Contract Development and Manufacturing Organizations) serving the life sciences sector.

Basic Information

Product Name	1-Cyclopentyl-1H-Pyrazole-5-Sulfonyl Chloride
CAS No.	1245807-09-3
Molecular Formula	C8H11ClN2O2S
Molecular Weight	234.70 g/mol
Synonyms	1-Cyclopentyl-1H-pyrazole-5-sulfonyl chloride; 1-Cyclopentylpyrazole-5-sulfonyl chloride; 1H-Pyrazole-5-sulfonyl chloride, 1-cyclopentyl-; Cyclopentylpyrazolesulfonyl chloride; 5-Sulfonylchloride-1-cyclopentylpyrazole; 1-Cyclopentyl-5-(chlorosulfonyl)-1H-pyrazole; 1245807-09-3
EINECS	Contact for details

Quality Control

Our 1-Cyclopentyl-1H-Pyrazole-5-Sulfonyl Chloride is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC, NMR, and mass spectrometry, to ensure high purity and consistent performance. 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, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	White to off-white solid
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Residual Solvents (GC)	Meets ICH guidelines

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