Description

1H-Pyrazole-1-Carbonyl Chloride, 3-Ethyl-4,5-Dihydro-4-Methyl- (9Ci) is a specialized heterocyclic acid chloride derivative, serving as a critical building block in advanced organic synthesis. Its reactive carbonyl chloride group makes it a versatile reagent for introducing the pyrazole moiety into target molecules, enabling the creation of complex chemical architectures. This high-purity intermediate is essential for research and development chemists in the pharmaceutical and agrochemical industries, where it is used to synthesize novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of novel drug candidates, particularly those targeting central nervous system (CNS) disorders and metabolic diseases.
• Agrochemical Synthesis: Used in the development of next-generation herbicides, fungicides, and insecticides, leveraging the pyrazole scaffold for bioactivity.
• Ligand and Catalyst Development: Serves as a starting material for creating specialized ligands used in asymmetric catalysis and metal-organic frameworks (MOFs).
• Material Science Research: Employed in the synthesis of functional polymers and advanced organic electronic materials.
• Custom Synthesis & Contract Manufacturing: A vital reagent for fine chemical and CDMO (Contract Development and Manufacturing Organization) facilities producing bespoke compounds for clients.
• Academic & Industrial R&D: Fundamental building block for exploratory chemistry in both university laboratories and corporate research centers.

Basic Information

Product Name	1H-Pyrazole-1-Carbonyl Chloride, 3-Ethyl-4,5-Dihydro-4-Methyl- (9Ci)
CAS No.	89662-71-5
Molecular Formula	C7H11ClN2O
Molecular Weight	174.63 g/mol
Synonyms	3-Ethyl-4,5-dihydro-4-methyl-1H-pyrazole-1-carbonyl chloride; 4,5-Dihydro-3-ethyl-4-methyl-1H-pyrazole-1-carbonyl chloride; 1H-Pyrazole-1-carbonyl chloride, 3-ethyl-4,5-dihydro-4-methyl-; 3-Ethyl-4-methyl-4,5-dihydro-1H-pyrazole-1-carbonyl chloride; Pyrazole-1-carbonyl chloride, 3-ethyl-4,5-dihydro-4-methyl-; 89662-71-5 (CAS)
EINECS	Contact for details

Quality Control

Our production of 1H-Pyrazole-1-Carbonyl Chloride, 3-Ethyl-4,5-Dihydro-4-Methyl- (9Ci) adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC, NMR, and IR spectroscopy, to ensure identity, purity, and consistency. We provide detailed Certificates of Analysis (COA) with each shipment, documenting all critical quality attributes. Our commitment to reliable supply and traceable quality supports your cGMP and ISO-compliant manufacturing processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent degradation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 3.0%

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