Description

1H-Pyrazole-1-Carbonyl Chloride, 4-Ethyl- (9Ci) is a specialized organic building block and reactive intermediate of significant interest in advanced chemical synthesis. This compound matters for its role as a key acylating agent, enabling the efficient introduction of the 4-ethylpyrazole-1-carbonyl moiety into target molecules. It is primarily needed by R&D chemists and process development scientists in the pharmaceutical and agrochemical industries for constructing novel active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: Serves as a critical 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 pesticides and herbicides, where the pyrazole core contributes to biological activity.
• Ligand and Catalyst Development: Employed in organometallic chemistry for the preparation of specialized ligands used in catalytic processes.
• Material Science Research: Acts as a monomer or cross-linking agent in the development of advanced polymers with specific thermal or chemical resistance properties.
• Custom Synthesis & Contract Manufacturing: A valuable reagent for custom synthesis houses and CDMOs (Contract Development and Manufacturing Organizations) serving the life sciences sector.

Basic Information

Item	Detail
Product Name	1H-Pyrazole-1-Carbonyl Chloride, 4-Ethyl- (9Ci)
CAS No.	67514-65-2
Molecular Formula	C6H7ClN2O
Molecular Weight	158.59 g/mol
Synonyms	4-Ethyl-1H-pyrazole-1-carbonyl chloride; 4-Ethylpyrazole-1-carbonyl chloride; 1-Carbonylchloride-4-ethylpyrazole; 4-Ethyl-1-pyrazolecarbonyl chloride
EINECS	Contact for details

Quality Control

Every batch of 1H-Pyrazole-1-Carbonyl Chloride, 4-Ethyl- (9Ci) is produced and tested under a strict quality management system. We ensure high purity and consistency to meet the exacting standards of research and process chemistry. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to guarantee reliable performance in your synthetic applications.

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 and reactivity as an acid chloride, it must be kept under an inert atmosphere (e.g., nitrogen or argon) and separated from strong bases and oxidizing agents. Recommended storage temperature is 2-8°C for long-term stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid or solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%

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