Description

1-(4-Chlorophenyl)-5-Methyl-1H-Pyrazole-4-Carbonyl Chloride is a high-purity, reactive chemical intermediate essential for advanced organic synthesis. This compound is valued for its role as a key building block in the creation of complex molecules with targeted biological activities. It is primarily sought by research institutions and manufacturers in the pharmaceutical and agrochemical sectors for the development of new active ingredients.

Application

• Pharmaceutical Intermediate: A critical precursor in the synthesis of novel drug candidates, particularly those targeting specific enzymes or receptors.
• Agrochemical Synthesis: Used in the research and production of advanced pesticides and herbicides, leveraging its heterocyclic structure.
• Chemical Research & Development: Serves as a versatile scaffold for medicinal chemistry and material science research programs.
• Active Pharmaceutical Ingredient (API) Manufacturing: Employed in the multi-step synthesis of complex APIs requiring a pyrazole-carboxylic acid derivative moiety.
• Custom Synthesis & Contract Manufacturing: A key starting material for fine chemical companies offering bespoke synthesis services.

Basic Information

Product Name	1-(4-Chlorophenyl)-5-Methyl-1H-Pyrazole-4-Carbonyl Chloride
CAS No.	288252-38-0
Molecular Formula	C11H8Cl2N2O
Molecular Weight	255.10 g/mol
Synonyms	4-Chlorobenzoyl chloride, 1-(4-chlorophenyl)-5-methyl-1H-pyrazole-; 1-(p-Chlorophenyl)-5-methyl-1H-pyrazole-4-carbonyl chloride; 5-Methyl-1-(4-chlorophenyl)-1H-pyrazole-4-carbonyl chloride; 1H-Pyrazole-4-carbonyl chloride, 1-(4-chlorophenyl)-5-methyl-; Pyrazole-4-carbonyl chloride derivative
EINECS	Contact for details

Quality Control

Our 1-(4-Chlorophenyl)-5-Methyl-1H-Pyrazole-4-Carbonyl Chloride is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via IR and NMR spectroscopy, to ensure it meets the high standards required for pharmaceutical and agrochemical applications. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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 materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 98.0%
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.