Description

5-Methyl-1-Phenyl-1H-Pyrazole-4-Sulfonyl Chloride is a high-purity sulfonyl chloride derivative, a critical building block in advanced organic synthesis. Its primary value lies in its high reactivity as a sulfonylation reagent, enabling the efficient 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 developing active pharmaceutical ingredients (APIs) and novel crop protection agents.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of sulfonamide-based drugs, including enzyme inhibitors and receptor antagonists.
• Agrochemical Synthesis: Used in the production of modern herbicides, fungicides, and insecticides that require a sulfonyl moiety for biological activity.
• Material Science Research: Serves as a monomer or cross-linking agent in the development of specialty polymers and functional materials.
• Chemical Biology & Proteomics: Employed as a reactive probe for labeling proteins or modifying biomolecules in research applications.
• Custom Synthesis & Contract Manufacturing: A vital starting material for custom synthesis projects and scale-up production under cGMP conditions.

Basic Information

Product Name	5-Methyl-1-Phenyl-1H-Pyrazole-4-Sulfonyl Chloride
CAS No.	342405-38-3
Molecular Formula	C10H9ClN2O2S
Molecular Weight	256.71 g/mol
Synonyms	1-Phenyl-5-methyl-1H-pyrazole-4-sulfonyl chloride; 5-Methyl-1-phenylpyrazole-4-sulfonyl chloride; 4-Pyrazolesulfonyl chloride, 1,5-dihydro-5-methyl-1-phenyl-; 1,5-Dihydro-5-methyl-1-phenyl-4-pyrazolesulfonyl chloride; 1H-Pyrazole-4-sulfonyl chloride, 1,5-dihydro-5-methyl-1-phenyl-; 5-Methyl-1-phenyl-1H-pyrazole-4-sulfonchlorid; 342405-38-3
EINECS	Contact for details

Quality Control

Our 5-Methyl-1-Phenyl-1H-Pyrazole-4-Sulfonyl Chloride is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC, NMR, and FTIR, to ensure high chemical purity and identity confirmation. Certificates of Analysis (COA) detailing all specifications are provided with every shipment. We support development and commercial projects requiring material traceability and documentation for regulatory submissions.

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 an inert atmosphere (e.g., nitrogen or argon) 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
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
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.