Description

4-Chloro-5-Hydrazinopyridazin-3(2H)-One is a versatile heterocyclic building block and key synthetic intermediate. Its molecular structure, featuring both a chloro substituent and a hydrazine moiety, makes it a critical precursor for constructing more complex nitrogen-containing compounds. This compound is primarily sought after by research chemists and process development scientists in the pharmaceutical and agrochemical industries. It enables the synthesis of novel pyridazine derivatives with potential biological activity.

Application

• Pharmaceutical Intermediate: Key building block for the synthesis of novel drug candidates, particularly those targeting central nervous system (CNS) disorders, cardiovascular diseases, and anti-inflammatory agents.
• Agrochemical Synthesis: Used in the research and development of new herbicides, fungicides, and insecticides based on the pyridazine scaffold.
• Chemical Research & Development: Serves as a versatile starting material for heterocyclic chemistry, enabling the creation of libraries of compounds for screening and structure-activity relationship (SAR) studies.
• Material Science Precursor: Investigated for the synthesis of specialized polymers, ligands for metal complexes, and other functional materials.

Basic Information

Product Name	4-Chloro-5-Hydrazinopyridazin-3(2H)-One
CAS No.	6959-56-4
Molecular Formula	C4H5ClN4O
Molecular Weight	160.56 g/mol
Synonyms	4-Chloro-5-hydrazinyl-2,3-dihydropyridazin-3-one; 5-Hydrazino-4-chloro-2H-pyridazin-3-one; 4-Chloro-5-hydrozinopyridazin-3(2H)-one; 3(2H)-Pyridazinone, 4-chloro-5-hydrozino-; 4-Chloro-5-hydrazino-3(2H)-pyridazinone; 4-Chloro-5-hydrazinopyridazin-3-ol (tautomer); 5-Chloro-6-hydrozinopyridazin-4(1H)-one (alternative numbering)
EINECS	Contact for details

Quality Control

Our 4-Chloro-5-Hydrazinopyridazin-3(2H)-One is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. A Certificate of Analysis (COA) detailing specifications such as assay (HPLC), related substances, and residual solvents is provided with every shipment. We support development and scale-up with reliable, high-quality material.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at a controlled room temperature (15-25°C). Due to its sensitivity to oxidation, it is recommended to store under an inert atmosphere (e.g., nitrogen or argon) for long-term preservation. Keep away from heat, sparks, and open flames.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Related Substances (HPLC)	Total impurities ≤ 3.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%

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