Description

1H-Pyrazole-5-Carbonyl Chloride, 1,4-Dimethyl- (9Ci) is a high-value, reactive organic intermediate belonging to the pyrazole family. This compound is a critical building block for the synthesis of more complex molecules, particularly in advanced pharmaceutical and agrochemical research. It is primarily sought after by R&D chemists and process development scientists in the fine chemical, pharmaceutical, and crop protection industries for constructing 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, inflammation, and metabolic diseases.
• Agrochemical Synthesis: Used as a building block for developing new generation herbicides, fungicides, and insecticides with improved efficacy and selectivity.
• Ligand and Catalyst Development: Serves as a starting material for creating specialized pyrazole-based ligands used in transition metal catalysis and coordination chemistry.
• Material Science Research: Employed in the development of advanced organic materials, including polymers and liquid crystals with specific electronic or optical properties.
• Custom Synthesis and Contract Manufacturing: A vital reagent for custom synthesis houses and CDMOs (Contract Development and Manufacturing Organizations) serving the life sciences sector.

Basic Information

Item	Details
Product Name	1H-Pyrazole-5-Carbonyl Chloride, 1,4-Dimethyl- (9Ci)
CAS No.	160886-90-8
Molecular Formula	C6H7ClN2O
Molecular Weight	158.59 g/mol
Synonyms	1,4-Dimethyl-1H-pyrazole-5-carbonyl chloride; 1,4-Dimethylpyrazole-5-carbonyl chloride; 1,4-Dimethyl-1H-pyrazole-5-carboxylic acid chloride; 5-(Chlorocarbonyl)-1,4-dimethyl-1H-pyrazole; 1,4-Dimethyl-1H-pyrazole-5-carboxylic chloride; 1,4-Dimethylpyrazole-5-carboxylic acid chloride; 1,4-Dimethyl-1H-pyrazole-5-carbonyl chloride (9CI)
EINECS	Contact for details

Quality Control

Our production of 1H-Pyrazole-5-Carbonyl Chloride, 1,4-Dimethyl- (9Ci) adheres to stringent in-process controls to ensure batch-to-batch consistency and high purity. Each lot is fully characterized and undergoes rigorous analytical testing, including HPLC, NMR, and IR spectroscopy. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality and regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at controlled room temperature (15-25°C). Due to its hygroscopic and reactive acid chloride nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent moisture absorption and decomposition. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder 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.