Description

3-Cyclopentapyrazolecarbonyl Chloride, 2,4,5,6-Tetrahydro-2-Methyl- (9Ci) is a high-value, reactive chemical intermediate essential for advanced organic synthesis. Its core value lies in its role as a versatile building block for constructing complex heterocyclic frameworks, enabling the development of novel compounds with targeted properties. This product is primarily needed by research and development teams in the pharmaceutical and agrochemical industries, where it is used to synthesize new active ingredients and explore innovative molecular pathways.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of novel drug candidates, particularly for central nervous system (CNS) and anti-inflammatory targets.
• Agrochemical Research: Used to develop new active ingredients for crop protection products, including herbicides and fungicides.
• Chemical Synthesis Building Block: Serves as a versatile reagent for constructing complex pyrazole and cyclopentane-fused heterocyclic compounds in academic and industrial R&D.
• Material Science Research: Employed in the development of specialty chemicals and advanced materials with specific functional properties.
• Contract Research & Manufacturing (CRO/CMO): Supplied to service organizations supporting pharmaceutical and chemical development pipelines.

Basic Information

Product Name	3-Cyclopentapyrazolecarbonyl Chloride, 2,4,5,6-Tetrahydro-2-Methyl- (9Ci)
CAS No.	146979-78-4
Molecular Formula	C9H11ClN2O
Molecular Weight	198.65 g/mol
Synonyms	2-Methyl-2,4,5,6-tetrahydro-3-cyclopentapyrazolecarbonyl chloride; 2-Methyl-4,5,6,7-tetrahydro-2H-indazole-3-carbonyl chloride; 2-Methyl-4,5,6,7-tetrahydro-1H-indazole-3-carbonyl chloride; 2-Methyl-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carbonyl chloride; 146979-78-4; Cyclopentapyrazolecarbonyl chloride derivative
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Each batch is analyzed to confirm identity, purity, and consistency. Certificates of Analysis (COA) detailing specifications such as assay (by HPLC), impurity profile, and physical characteristics are available upon request. We adhere to strict internal quality management protocols to ensure supply reliability for your critical R&D and scale-up projects.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation. Keep away from strong acids and incompatible organic solvents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Related Substances (HPLC)	Total impurities ≤ 3.0%
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.