Description

1H-Pyrazole-5-Carbonyl Chloride, 4-Chloro-3-Methoxy-1-Methyl- (9Ci) is a high-purity, reactive chemical intermediate belonging to the pyrazole class of heterocyclic compounds. This compound matters for its role as a critical building block in the synthesis of complex molecules, particularly in the pharmaceutical and agrochemical sectors. It is primarily needed by R&D chemists and process development scientists working on active pharmaceutical ingredients (APIs), crop protection agents, and advanced material science applications.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of novel drug candidates, particularly in kinase inhibitor and anti-inflammatory research.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and insecticides requiring a specific pyrazole core structure.
• Material Science Research: Serves as a precursor for functional polymers and liquid crystals due to its reactive acid chloride group.
• Chemical Biology Probes: Utilized in the development of labeled compounds and molecular probes for biochemical assays.
• Custom Synthesis & Contract Manufacturing: A vital starting material for fine chemical manufacturers offering bespoke synthesis services.

Basic Information

Product Name	1H-Pyrazole-5-Carbonyl Chloride, 4-Chloro-3-Methoxy-1-Methyl- (9Ci)
CAS No.	170788-56-4
Molecular Formula	C6H6Cl2NO2
Molecular Weight	209.03 g/mol
Synonyms	4-Chloro-3-methoxy-1-methyl-1H-pyrazole-5-carbonyl chloride; 4-Chloro-3-methoxy-1-methylpyrazole-5-carbonyl chloride; 1-Methyl-4-chloro-3-methoxypyrazole-5-carbonyl chloride; 1H-Pyrazole-5-carbonyl chloride, 4-chloro-3-methoxy-1-methyl-; 170788-56-4; 4-Chloro-3-methoxy-1-methyl-1H-pyrazole-5-carboxylic acid chloride
EINECS	Contact for details

Quality Control

Our 1H-Pyrazole-5-Carbonyl Chloride, 4-Chloro-3-Methoxy-1-Methyl- (9Ci) is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, identity, and impurity profiles. Our quality system is designed to meet the stringent requirements of GMP and ISO standards for advanced chemical intermediates.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place. Due to its hygroscopic and highly volatile nature, it is recommended to store under an inert atmosphere (e.g., nitrogen or argon) at a controlled room temperature (15-25°C). Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Single Unknown Impurity	≤ 0.5%

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