Description

1-Pyrazolidinecarbonyl Chloride, 5-Methyl-3-Oxo- (9Ci) is a specialized organic intermediate featuring a reactive acid chloride group on a pyrazolidine scaffold. This compound is valued for its role as a key building block in the synthesis of more complex heterocyclic molecules, particularly in pharmaceutical research and development. It is primarily sought by R&D chemists and process development scientists in the fine chemical and pharmaceutical industries for constructing novel active pharmaceutical ingredients (APIs) and other high-value compounds.

Application

• Pharmaceutical Intermediate: A crucial building block for the synthesis of novel heterocyclic compounds with potential biological activity.
• Agrochemical Research: Used in the development of new pesticides and herbicides, leveraging its reactive site for structural diversification.
• Material Science: Serves as a monomer or cross-linking agent in the development of specialized polymers and advanced materials.
• Chemical Synthesis: Employed in academic and industrial laboratories for methodological studies and the creation of complex molecular architectures.
• Dye and Pigment Industry: Acts as a precursor in the synthesis of specialized colorants and functional dyes.

Basic Information

Product Name	1-Pyrazolidinecarbonyl Chloride, 5-Methyl-3-Oxo- (9Ci)
CAS No.	54944-91-1
Molecular Formula	C5H7ClN2O2
Molecular Weight	162.57 g/mol
Synonyms	5-Methyl-3-oxo-1-pyrazolidinecarbonyl chloride; 5-Methyl-3-oxo-1-pyrazolidinecarboxylic acid chloride; 5-Methyl-3-oxopyrazolidine-1-carbonyl chloride; 1-(Chlorocarbonyl)-5-methyl-3-pyrazolidinone; 5-Methyl-3-oxo-2-pyrazoline-1-carbonyl chloride (tautomeric form)
EINECS	Contact for details

Quality Control

Our production of 1-Pyrazolidinecarbonyl Chloride, 5-Methyl-3-Oxo- (9Ci) adheres to stringent internal quality protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques such as HPLC, NMR, and IR spectroscopy. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and should be handled under an inert atmosphere (e.g., nitrogen or argon) to prevent decomposition. Keep away from strong acids and incompatible organic solvents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
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.