Description

1H-Pyrazole-5-Carbonyl Chloride, 4-Chloro-3-Ethyl-1-Methyl- (9Ci) is a high-purity, reactive organic intermediate of significant importance in advanced chemical synthesis. Its core value lies in its role as a versatile building block for constructing complex heterocyclic frameworks, particularly in the pharmaceutical and agrochemical sectors. This compound is essential for researchers and manufacturers developing novel active ingredients, where precise molecular architecture is critical for function.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of novel drug candidates, particularly those targeting central nervous system (CNS) disorders and metabolic diseases.
• Agrochemical Synthesis: Used in the development of next-generation herbicides, fungicides, and insecticides with improved efficacy and environmental profiles.
• Material Science Research: Serves as a precursor for specialized polymers and liquid crystals with tailored electronic or optical properties.
• Chemical Biology Probes: Employed in the creation of labeled compounds and activity-based probes for studying enzyme function and biological pathways.
• Custom Synthesis & Contract Manufacturing: A critical reagent for fine chemical companies offering bespoke synthesis services for clients in life sciences.

Basic Information

Item	Details
Product Name	1H-Pyrazole-5-Carbonyl Chloride, 4-Chloro-3-Ethyl-1-Methyl- (9Ci)
CAS No.	129560-00-5
Molecular Formula	C7H8Cl2N2O
Molecular Weight	207.06 g/mol
Synonyms	4-Chloro-3-ethyl-1-methyl-1H-pyrazole-5-carbonyl chloride; 4-Chloro-3-ethyl-1-methylpyrazole-5-carbonyl chloride; 1-Methyl-4-chloro-3-ethylpyrazole-5-carbonyl chloride; 1H-Pyrazole-5-carbonyl chloride, 4-chloro-3-ethyl-1-methyl-; 129560-00-5; 4-Chloro-3-ethyl-1-methyl-1H-pyrazole-5-carboxylic acid chloride
EINECS	Contact for details

Quality Control

Every batch of 1H-Pyrazole-5-Carbonyl Chloride, 4-Chloro-3-Ethyl-1-Methyl- (9Ci) is manufactured under strict quality management systems. Our products undergo rigorous analytical testing, including HPLC, NMR, and GC-MS, to ensure identity, purity, and consistency meet the stringent requirements of advanced synthesis. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive) and reacts with strong acids/organic solvents; keep the container tightly sealed under an inert atmosphere (e.g., nitrogen or argon) to prevent degradation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
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.