Description

4-Chloro-2,5-Dimethyl-Pyrazole-3-Sulfonyl Chloride is a versatile and highly reactive sulfonyl chloride derivative, serving as a critical building block in advanced organic synthesis. Its value lies in its dual functionality, enabling the efficient introduction of both a halogenated pyrazole moiety and a sulfonyl chloride group into target molecules. This compound is essential for researchers and manufacturers in the pharmaceutical and agrochemical industries, where it is used to create novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for sulfonamide-based drugs.
• Agrochemical Synthesis: Building block for developing new herbicides, fungicides, and insecticides with enhanced efficacy.
• Functional Material Development: Used in creating specialty polymers, dyes, and liquid crystals.
• Chemical Research & Development: A valuable reagent for medicinal chemistry and process chemistry for constructing complex heterocyclic systems.
• Cross-Coupling Reactions: Serves as an electrophile in palladium-catalyzed cross-coupling reactions to form carbon-sulfur bonds.

Basic Information

Item	Detail
Product Name	4-Chloro-2,5-Dimethyl-Pyrazole-3-Sulfonyl Chloride
CAS No.	88398-87-2
Molecular Formula	C5H6Cl2N2O2S
Molecular Weight	241.08 g/mol
Synonyms	4-Chloro-2,5-dimethyl-1H-pyrazole-3-sulfonyl chloride; 2,5-Dimethyl-4-chloro-pyrazole-3-sulfonyl chloride; 4-Chloro-2,5-dimethylpyrazole-3-sulfonyl chloride; 1H-Pyrazole-3-sulfonyl chloride, 4-chloro-2,5-dimethyl-; 4-Chloro-2,5-dimethyl-3-pyrazolesulfonyl chloride
EINECS	Contact for details

Quality Control

Our production of 4-Chloro-2,5-Dimethyl-Pyrazole-3-Sulfonyl Chloride adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC, NMR, and IR spectroscopy, to ensure identity, purity, and consistency. Certificates of Analysis (COA) documenting all critical parameters are available upon request, providing full traceability and compliance with your internal quality standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); keep the container tightly sealed under an inert atmosphere (e.g., nitrogen or argon) for long-term storage to prevent decomposition. 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
Loss on Drying	≤ 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.