Description

1-Ethyl-5-Methyl-1H-Pyrazole-4-Sulfonyl Chloride is a high-purity sulfonyl chloride derivative, a critical building block in modern organic synthesis. Its primary value lies in its reactivity as a versatile 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 the development of active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of novel drug candidates, especially in medicinal chemistry programs targeting enzyme inhibitors.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and pesticides, where the sulfonyl moiety is a common pharmacophore.
• Material Science Research: Employed in the development of functional polymers and advanced materials with specific surface properties.
• Chemical Biology Probes: Acts as a reagent for labeling and modifying biomolecules in proteomics and biochemical research.
• Custom Synthesis & Contract Manufacturing: A vital starting material for custom synthesis houses serving the life sciences sector.

Basic Information

Product Name	1-Ethyl-5-Methyl-1H-Pyrazole-4-Sulfonyl Chloride
CAS No.	957261-55-1
Molecular Formula	C6H9ClN2O2S
Molecular Weight	208.67 g/mol
Synonyms	1-Ethyl-5-methyl-1H-pyrazole-4-sulfonyl chloride; 4-Sulfonyl chloride-1-ethyl-5-methylpyrazole; 1-Ethyl-5-methylpyrazole-4-sulfonyl chloride; 1H-Pyrazole-4-sulfonyl chloride, 1-ethyl-5-methyl-; 957261-55-1; 1-Ethyl-5-methyl-1H-pyrazol-4-ylsulfonyl chloride; 1-Ethyl-5-methyl-4-pyrazolesulfonyl chloride
EINECS	Contact for details

Quality Control

Our 1-Ethyl-5-Methyl-1H-Pyrazole-4-Sulfonyl Chloride is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity, suitable for demanding synthetic applications. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, identity, and impurity profiles. Our quality management system is designed to meet the stringent requirements of GMP and ISO standards for advanced intermediates.

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 must be kept under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent decomposition. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%

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