Description

4H-1-Benzopyran-4-One, 5-Bromo-8-Methyl- CAS NO 331683-40-0 is a brominated and methylated derivative of chromen-4-one, serving as a valuable specialty organic intermediate for advanced chemical synthesis. Its unique structure makes it a critical building block for developing novel compounds with specific functional properties. This high-purity intermediate is primarily sought by pharmaceutical R&D and agrochemical laboratories for creating new active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: Key precursor in the synthesis of novel drug candidates, particularly for therapeutic areas requiring chromone or flavone-based scaffolds.
• Agrochemical Research: Used in developing new generation pesticides, herbicides, and plant growth regulators where the bromo-methyl chromone structure imparts specific bioactivity.
• Material Science: Serves as a monomer or functionalizing agent in the creation of advanced organic electronic materials, dyes, and pigments.
• Academic & Industrial R&D: Essential for chemical research in medicinal chemistry, organic synthesis, and process development for scaling novel compounds.
• Fine Chemical Synthesis: Building block for synthesizing complex molecules used in flavors, fragrances, and other high-value specialty chemicals.

Basic Information

Product Name	4H-1-Benzopyran-4-One, 5-Bromo-8-Methyl- CAS NO 331683-40-0
CAS No.	331683-40-0
Molecular Formula	C10H7BrO2
Molecular Weight	239.07 g/mol
Synonyms	5-Bromo-8-methylchromen-4-one; 5-Bromo-8-methyl-4H-chromen-4-one; 5-Bromo-8-methyl-4H-1-benzopyran-4-one; 8-Methyl-5-bromochromone; 5-Bromo-8-methyl-4-chromone; Bromomethylchromone derivative
EINECS	Contact for details

Quality Control

Our production of 4H-1-Benzopyran-4-One, 5-Bromo-8-Methyl- adheres to stringent GMP-like guidelines to ensure batch-to-batch consistency and high purity suitable for research and development. Each lot is fully characterized and undergoes rigorous analytical testing, including HPLC, NMR, and MS, to confirm identity and purity. Certificates of Analysis (COA) detailing all specifications are provided and available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Keep away from heat, sparks, and open flame. This material is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 97.0%
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.