Description

5-Chloro-1,3-Dimethylpyrazole-4-Sulfonyl Chloride is a versatile and highly reactive sulfonyl chloride derivative, serving as a critical building block in advanced organic synthesis. Its primary value lies in its ability to act as a sulfonylation reagent, facilitating the introduction of the sulfonyl functional group into target molecules. This compound is essential for researchers and manufacturers in the pharmaceutical and agrochemical industries, particularly for the development of active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: Key building block for synthesizing sulfonamide-based drug candidates, including enzyme inhibitors and receptor antagonists.
• Agrochemical Synthesis: Used in the production of novel herbicides, fungicides, and insecticides that require the sulfonyl moiety for bioactivity.
• Functional Material Precursor: Employed in the research and development of specialty polymers, dyes, and photoactive materials.
• Chemical Biology & Proteomics: Acts as a reactive handle for labeling or modifying biomolecules in research applications.
• Custom Synthesis & Contract Manufacturing: Supplied to CDMOs for the production of bespoke compounds and advanced intermediates.

Basic Information

Product Name	5-Chloro-1,3-Dimethylpyrazole-4-Sulfonyl Chloride
CAS No.	88398-93-0
Molecular Formula	C5H6Cl2N2O2S
Molecular Weight	241.08 g/mol
Synonyms	4-Chlorosulfonyl-5-chloro-1,3-dimethylpyrazole; 1,3-Dimethyl-5-chloropyrazole-4-sulfonyl chloride; 5-Chloro-1,3-dimethyl-1H-pyrazole-4-sulfonyl chloride; 5-Chloro-1,3-dimethyl-4-pyrazolesulfonyl chloride; 1H-Pyrazole-4-sulfonyl chloride, 5-chloro-1,3-dimethyl-; 5-Chloro-1,3-dimethylpyrazole-4-sulfonylchloride
EINECS	Contact for details

Quality Control

Every batch of 5-Chloro-1,3-Dimethylpyrazole-4-Sulfonyl Chloride is produced and tested under a strict quality management system. We ensure compliance with relevant industry standards for fine chemical intermediates. A comprehensive Certificate of Analysis (COA), detailing purity, identity, and impurity profiles, is provided with each shipment to guarantee consistent quality and traceability for your critical synthesis workflows.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and light-sensitive; containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Melting Point	Contact for details
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

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