Description

4-Bromophthalazin-1(2H)-One is a versatile brominated heterocyclic building block of significant interest in advanced organic synthesis. Its core value lies in serving as a key precursor for the development of novel pharmaceutical compounds and functional materials. This high-purity intermediate is primarily needed by research institutions and industrial manufacturers in the pharmaceutical, agrochemical, and specialty chemical sectors for constructing complex molecular architectures.

Application

• Pharmaceutical Intermediate: A critical precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly for kinase inhibitors and other targeted therapies.
• Agrochemical Research: Used in the development of new herbicides, fungicides, and plant growth regulators.
• Material Science: Serves as a building block for organic light-emitting diodes (OLEDs) and other electronic materials.
• Chemical Synthesis: Employed in palladium-catalyzed cross-coupling reactions (e.g., Suzuki, Buchwald-Hartwig) to introduce complex phthalazine motifs.
• Dye & Pigment Industry: Acts as an intermediate for the production of specialized dyes and colorants.
• Academic & R&D: A valuable reagent for medicinal chemistry programs and novel heterocyclic compound exploration.

Basic Information

Product Name	4-Bromophthalazin-1(2H)-One
CAS No.	19064-73-4
Molecular Formula	C8H5BrN2O
Molecular Weight	225.04 g/mol
Synonyms	4-Bromophthalazin-1(2H)-one; 4-Bromo-1(2H)-phthalazinone; 4-Bromo-1-phthalazinone; 4-Bromo-2H-phthalazin-1-one; 4-Bromophthalazinone; 1(2H)-Phthalazinone, 4-bromo-; 4-Bromo-1,2-dihydrophthalazin-1-one
EINECS	Contact for details

Quality Control

Our 4-Bromophthalazin-1(2H)-One is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC, NMR, and mass spectrometry, to ensure high chemical purity and identity confirmation. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing all relevant specifications. Our quality commitment supports applications requiring reliable and consistent performance in critical synthesis.

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. The product is light-sensitive and should be stored away from light.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Melting Point	Contact for details
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.