Description

2(1H)-Pyrimidinone, 5-Chloro-4-Methyl- (9Ci) is a halogenated pyrimidinone derivative, a key heterocyclic building block in advanced organic synthesis. This compound matters for its role as a versatile intermediate in the development of active pharmaceutical ingredients (APIs) and agrochemicals. It is primarily needed by research and development chemists, process development scientists, and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries.

Application

• Pharmaceutical Intermediate: A crucial precursor in the synthesis of nucleoside analogs, antiviral agents, and other biologically active molecules.
• Agrochemical Synthesis: Used in the research and production of novel herbicides, fungicides, and plant growth regulators.
• Chemical Research: Serves as a fundamental scaffold for medicinal chemistry and drug discovery programs targeting various disease pathways.
• Material Science: Potential building block for the development of specialty polymers and advanced organic materials.
• Custom Synthesis: Employed in contract manufacturing for the production of complex, customer-specific fine chemicals.

Basic Information

Product Name	2(1H)-Pyrimidinone, 5-Chloro-4-Methyl- (9Ci)
CAS No.	63331-35-1
Molecular Formula	C5H5ClN2O
Molecular Weight	144.56 g/mol
Synonyms	5-Chloro-4-methylpyrimidin-2(1H)-one; 5-Chloro-4-methyl-2(1H)-pyrimidinone; 4-Methyl-5-chloropyrimidin-2(1H)-one; 5-Chloro-4-methyl-1H-pyrimidin-2-one; 5-Chloro-4-methyl-1,2-dihydropyrimidin-2-one; 5-Chloro-4-methyluracil (common misnomer, structurally related); 63331-35-1 (CAS Registry Number)
EINECS	Contact for details

Quality Control

Our 2(1H)-Pyrimidinone, 5-Chloro-4-Methyl- (9Ci) is produced under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for research and industrial synthesis. Certificates of Analysis (COA) with detailed specifications are provided for every shipment to guarantee traceability and batch-to-batch consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Keep away from incompatible materials. The product is light-sensitive and should be stored away from light as indicated.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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