Description

4-Bromo-5-Chloro-3(2H)-Pyridazinone is a high-purity halogenated heterocyclic building block essential for advanced organic synthesis. This compound serves as a critical intermediate in the development of novel active pharmaceutical ingredients (APIs) and agrochemicals, enabling precise molecular modifications. It is primarily required by R&D chemists and process development scientists in the pharmaceutical, agrochemical, and specialty chemical industries for creating new compounds with targeted biological activity.

Application

• Pharmaceutical Intermediate: Key building block for synthesizing novel drug candidates, particularly in central nervous system (CNS) and cardiovascular therapeutic areas.
• Agrochemical Synthesis: Used in the research and production of advanced herbicides, fungicides, and plant growth regulators.
• Chemical Research: Serves as a versatile scaffold in medicinal chemistry for structure-activity relationship (SAR) studies and library synthesis.
• Material Science: Potential precursor for developing specialty polymers and functional materials with specific electronic properties.
• Contract Manufacturing: Supplied to CDMOs (Contract Development and Manufacturing Organizations) for custom synthesis projects under cGMP conditions.

Basic Information

Product Name	4-Bromo-5-Chloro-3(2H)-Pyridazinone
CAS No.	119729-96-3
Molecular Formula	C4H2BrClN2O
Molecular Weight	209.43 g/mol
Synonyms	4-Bromo-5-chloro-3(2H)-pyridazinone; 4-Bromo-5-chloro-2,3-dihydropyridazin-3-one; 5-Chloro-4-bromo-3(2H)-pyridazinone; 3(2H)-Pyridazinone, 4-bromo-5-chloro-; 4-Bromo-5-chloro-1,2-dihydropyridazine-3-one; 4-Bromo-5-chloro-2H-pyridazin-3-one; 119729-96-3 (CAS)
EINECS	Contact for details

Quality Control

Our 4-Bromo-5-Chloro-3(2H)-Pyridazinone is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via FT-IR and NMR, to ensure it meets the stringent requirements for pharmaceutical and agrochemical intermediates. A detailed Certificate of Analysis (COA) is provided with every shipment, documenting compliance with agreed specifications.

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 material is moisture-sensitive (hygroscopic); keep the container tightly sealed in a dry environment.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time matches reference standard
Assay (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Any single impurity	≤ 0.5%
Loss on Drying	≤ 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.