Description

1H-Pyrazole-3-Carboxylic Acid, 5-(Chlorocarbonyl)-1-Methyl-, Methyl Ester (9Ci) is a high-purity, multi-functional chemical intermediate designed for advanced synthesis. This compound is valued for its reactive chlorocarbonyl and ester groups, which enable precise derivatization in complex molecular construction. It is primarily sought by research institutions and manufacturers in the pharmaceutical and agrochemical sectors for developing novel active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of novel drug candidates, particularly in medicinal chemistry research targeting various therapeutic areas.
• Agrochemical Synthesis: Used in the development and production of advanced pesticides, herbicides, and plant growth regulators.
• Organic Synthesis Reagent: Serves as a versatile precursor for introducing the pyrazole-carboxylate moiety into more complex organic molecules in research and development.
• Ligand and Coordination Chemistry: Potential precursor for creating specialized ligands used in catalysis and material science applications.
• Fine Chemical Production: Employed in the manufacture of specialty chemicals, dyes, and performance materials requiring specific heterocyclic structures.

Basic Information

Product Name	1H-Pyrazole-3-Carboxylic Acid, 5-(Chlorocarbonyl)-1-Methyl-, Methyl Ester (9Ci)
CAS No.	203792-49-8
Molecular Formula	C7H7ClN2O3
Molecular Weight	202.60 g/mol
Synonyms	5-(Chlorocarbonyl)-1-methyl-1H-pyrazole-3-carboxylic acid methyl ester; Methyl 5-(chlorocarbonyl)-1-methyl-1H-pyrazole-3-carboxylate; 1-Methyl-5-(chloroformyl)-1H-pyrazole-3-carboxylic acid methyl ester; 1-Methyl-1H-pyrazole-3,5-dicarboxylic acid 5-chloride 3-methyl ester; 203792-49-8; 5-(Methoxycarbonyl)-1-methyl-1H-pyrazole-3-carbonyl chloride
EINECS	Contact for details

Quality Control

Our production of 1H-Pyrazole-3-Carboxylic Acid, 5-(Chlorocarbonyl)-1-Methyl-, Methyl Ester (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. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (typically 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 strong acids and incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
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.