Description

4-(1H-Pyrazol-1-Yl)Benzenesulfonyl Chloride is a high-purity sulfonyl chloride derivative, a crucial sulfonating agent and key synthetic intermediate in advanced organic synthesis. Its primary value lies in introducing the versatile sulfonyl functional group, enabling the construction of complex molecules with tailored properties. This compound is essential for R&D and production chemists in the pharmaceutical and agrochemical industries, where it is used to create novel active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of sulfonamide-based drug candidates, including kinase inhibitors and receptor antagonists.
• Agrochemical Synthesis: Used in the development of new herbicides, fungicides, and insecticides that require the sulfonyl moiety for bioactivity.
• Material Science Research: Serves as a monomer or cross-linking agent in the creation of specialty polymers and functional materials.
• Chemical Biology Probes: Employed to modify proteins or other biomolecules for study, leveraging its reactive sulfonyl chloride group.
• Dye and Pigment Manufacturing: Intermediate in the production of sulfonated dyes and colorants.
• Custom Synthesis and Contract Manufacturing: A critical reagent for custom synthesis houses serving the life sciences sector.

Basic Information

Product Name	4-(1H-Pyrazol-1-Yl)Benzenesulfonyl Chloride
CAS No.	18336-39-5
Molecular Formula	C9H7ClN2O2S
Molecular Weight	242.68 g/mol
Synonyms	1-(4-Chlorosulfonylphenyl)pyrazole; 4-(1H-Pyrazol-1-yl)benzenesulfonyl chloride; 4-(Pyrazol-1-yl)benzenesulfonyl chloride; 1-(4-Chlorosulfonylphenyl)-1H-pyrazole; p-(1-Pyrazolyl)benzenesulfonyl chloride; Benzenesulfonyl chloride, 4-(1H-pyrazol-1-yl)-; 4-(1-Pyrazolyl)phenylsulfonyl chloride
EINECS	Contact for details

Quality Control

Our 4-(1H-Pyrazol-1-Yl)Benzenesulfonyl Chloride is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. Production adheres to cGMP guidelines where applicable. Every lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles, available upon request. We support our clients' regulatory needs with full traceability and documentation.

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). This product is hygroscopic (moisture-sensitive) and should be handled under anhydrous conditions to prevent decomposition. Keep away from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%
Single Unknown Impurity (HPLC)	≤ 0.5%
Total Impurities (HPLC)	≤ 2.0%

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