Description

4-Chloro-1-Isopropyl-3-Methyl-1H-Pyrazole-5-Sulfonyl Chloride is a high-value, multi-functional chemical intermediate essential for advanced synthesis. Its core value proposition lies in its dual reactive sites, the chloro and sulfonyl chloride groups, which enable its use as a versatile building block for constructing complex molecular architectures. This compound is primarily needed by R&D and production teams in the pharmaceutical and agrochemical industries for developing new active ingredients.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of novel drug candidates, particularly in medicinal chemistry programs targeting enzyme inhibition.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and insecticides, where the pyrazole core is a privileged scaffold.
• Chemical Research (R&D): Serves as a versatile reagent for constructing heterocyclic compounds and introducing sulfonamide functionalities in discovery chemistry.
• Material Science: Potential precursor for functional polymers or ligands in catalytic systems due to its reactive sulfonyl chloride group.
• Custom Synthesis & Contract Manufacturing: Supplied to CDMOs (Contract Development and Manufacturing Organizations) for client-specific synthesis projects.

Basic Information

Item	Details
Product Name	4-Chloro-1-Isopropyl-3-Methyl-1H-Pyrazole-5-Sulfonyl Chloride
CAS No.	1245807-33-3
Molecular Formula	C7H10Cl2N2O2S
Molecular Weight	257.14 g/mol
Synonyms	1H-Pyrazole-5-sulfonyl chloride, 4-chloro-1-(1-methylethyl)-3-methyl-; 4-Chloro-1-isopropyl-3-methylpyrazole-5-sulfonyl chloride; 1-Isopropyl-3-methyl-4-chloro-pyrazole-5-sulfonyl chloride; 4-Chloro-1-isopropyl-3-methyl-1H-pyrazole-5-sulfonyl chloride; CAS 1245807-33-3
EINECS	Contact for details

Quality Control

Our production of 4-Chloro-1-Isopropyl-3-Methyl-1H-Pyrazole-5-Sulfonyl Chloride adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including HPLC, NMR, and GC-MS, to ensure high purity and consistent chemical identity. Certificates of Analysis (COA) detailing all specifications are provided with each shipment to guarantee traceability and compliance with your project requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place. Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen) after opening to prevent degradation. Recommended storage temperature is 2-8°C for long-term stability.

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.