Description

4-Chloro-1,2-Dihydrophthalazin-1-One is a versatile heterocyclic building block of significant interest in advanced organic synthesis. This compound serves as a critical intermediate for the development of novel pharmaceutical agents and functional materials. It is primarily utilized by research and development chemists in the pharmaceutical, agrochemical, and specialty chemical industries seeking to create new molecular entities with targeted biological or physical properties.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of various active pharmaceutical ingredients (APIs), particularly those with phthalazinone or related heterocyclic cores.
• Agrochemical Research: Used in the development of new herbicides, fungicides, and insecticides, leveraging its heterocyclic structure for bioactivity.
• Material Science: Serves as a building block for organic ligands in catalysis or for creating novel polymers and dyes with specific optical or electronic properties.
• Chemical Synthesis: Employed in academic and industrial R&D for constructing complex nitrogen-containing heterocycles through various cyclization and functionalization reactions.

Basic Information

Product Name	4-Chloro-1,2-Dihydrophthalazin-1-One
CAS No.	2257-69-4
Molecular Formula	C8H5ClN2O
Molecular Weight	180.59 g/mol
Synonyms	4-Chloro-1,2-dihydrophthalazin-1-one; 4-Chloro-1H-phthalazin-1-one; 4-Chlorophthalazin-1(2H)-one; 4-Chloro-2H-phthalazin-1-one; 1(2H)-Phthalazinone, 4-chloro-; 4-Chloro-1-phthalazinone; 4-Chloro-1(2H)-phthalazinone
EINECS	Contact for details

Quality Control

Our 4-Chloro-1,2-Dihydrophthalazin-1-One is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing specifications such as assay (HPLC), related substances, and physical characteristics is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
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.