Description

1-Ethyl-3-Methyl-1H-Pyrazole-4-Carbonyl Chloride is a high-purity, reactive acyl chloride derivative of a pyrazole heterocycle. This compound serves as a critical building block in modern organic synthesis, enabling the efficient introduction of the 1-ethyl-3-methylpyrazole-4-carbonyl moiety. It is primarily sought after by research and development chemists in the pharmaceutical and agrochemical industries for the synthesis of novel active ingredients and advanced intermediates.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for candidates targeting central nervous system (CNS) disorders and metabolic diseases.
• Agrochemical Synthesis: Used in the research and production of novel herbicides, fungicides, and insecticides, where the pyrazole core contributes to biological activity.
• Ligand and Catalyst Development: Serves as a starting material for creating specialized pyrazole-based ligands used in coordination chemistry and catalysis.
• Material Science Research: Employed in the development of advanced organic materials, including polymers and liquid crystals with specific electronic 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

Product Name	1-Ethyl-3-Methyl-1H-Pyrazole-4-Carbonyl Chloride
CAS No.	1171573-50-4
Molecular Formula	C7H9ClN2O
Molecular Weight	172.61 g/mol
Synonyms	1-Ethyl-3-methyl-1H-pyrazole-4-carbonyl chloride; 1-Ethyl-3-methylpyrazole-4-carbonyl chloride; 4-Carbonyl chloride-1-ethyl-3-methylpyrazole; 1H-Pyrazole-4-carbonyl chloride, 1-ethyl-3-methyl-; EMPC-Cl; 1-Ethyl-3-methyl-4-pyrazolecarbonyl chloride
EINECS	Contact for details

Quality Control

Our 1-Ethyl-3-Methyl-1H-Pyrazole-4-Carbonyl Chloride is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC, NMR, and IR spectroscopy, to ensure high chemical purity and identity confirmation. We provide a detailed Certificate of Analysis (COA) with every shipment, documenting all critical quality attributes. Our commitment to cGMP principles and regulatory compliance ensures material integrity for demanding research and scale-up applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and must be kept under an inert atmosphere (e.g., nitrogen or argon) after opening to prevent decomposition. Keep away from heat, open flames, and incompatible materials such as strong bases, alcohols, and water.

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%
Residue on Ignition	≤ 0.1%

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