Description

1H-Pyrazole-1-Carbonyl Chloride, 4,5-Dihydro-3-Methyl- (9Ci) is a reactive heterocyclic building block, specifically a carbonyl chloride derivative of a dihydropyrazole. This compound matters as a versatile intermediate for introducing the pyrazole moiety into more complex molecular architectures, enabling the synthesis of novel active ingredients. It is primarily needed by R&D chemists and process development teams in the pharmaceutical and agrochemical industries for creating new drug candidates, crop protection agents, and other specialty chemicals.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of novel active pharmaceutical ingredients (APIs), particularly in medicinal chemistry research for creating potential therapeutic agents.
• Agrochemical Synthesis: Used in the development and production of advanced pesticides, herbicides, and fungicides, leveraging the pyrazole core's bioactivity.
• Chemical Research & Development: Serves as a crucial reagent in organic synthesis for constructing complex heterocyclic compounds and exploring new chemical spaces.
• Material Science Applications: Potential use in the synthesis of specialty polymers, ligands for catalysis, or advanced organic materials with specific electronic properties.

Basic Information

Product Name	1H-Pyrazole-1-Carbonyl Chloride, 4,5-Dihydro-3-Methyl- (9Ci)
CAS No.	89662-67-9
Molecular Formula	C5H7ClN2O
Molecular Weight	146.57 g/mol
Synonyms	4,5-Dihydro-3-methyl-1H-pyrazole-1-carbonyl chloride; 3-Methyl-4,5-dihydro-1H-pyrazole-1-carbonyl chloride; 1-Carbonylchloride-3-methyl-4,5-dihydropyrazole; 3-Methyl-2-pyrazoline-1-carbonyl chloride; 4,5-Dihydro-3-methylpyrazole-1-carbonyl chloride; 1H-Pyrazole-1-carbonyl chloride, 4,5-dihydro-3-methyl-
EINECS	Contact for details

Quality Control

Our 1H-Pyrazole-1-Carbonyl Chloride, 4,5-Dihydro-3-Methyl- (9Ci) is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing, including HPLC, NMR, and IR spectroscopy, to ensure high purity and consistent performance as a chemical intermediate. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is available for every shipment upon request.

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 or argon) after opening to prevent decomposition. 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)	≥ 95.0%
Water Content (KF)	≤ 0.5%

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