Description

4-Isoxazolecarboxylicacid,3-Bromo-5-Methyl-(9Ci) CAS NO 130742-22-2 is a high-purity brominated isoxazole derivative, a versatile and critical heterocyclic building block in advanced organic synthesis. Its value lies in its unique molecular scaffold, which enables the construction of complex pharmacophores and functional materials with targeted properties. This compound is essential for research chemists and process development scientists in the pharmaceutical, agrochemical, and material science industries seeking to develop new active ingredients and specialty chemicals.

Application

• Pharmaceutical Intermediate: Serves as a key precursor in the synthesis of novel drug candidates, particularly those targeting central nervous system (CNS) disorders, anti-inflammatory agents, and antimicrobials.
• Agrochemical Research: Used in developing new generations of herbicides, fungicides, and insecticides, leveraging the bioactivity of the isoxazole ring.
• Material Science: Acts as a building block for advanced polymers, liquid crystals, and organic electronic materials due to its rigid heterocyclic structure and functional groups.
• Chemical Biology & Proteomics: Employed as a molecular probe or a tag in activity-based protein profiling (ABPP) and bioconjugation strategies.
• Academic & Contract Research: A valuable reagent for methodological studies in organic chemistry, including cross-coupling reactions and heterocycle functionalization.
• Custom Synthesis: Provides a foundational structure for contract manufacturing organizations (CMOs) to produce bespoke compounds for client-specific R&D programs.

Basic Information

Product Name	4-Isoxazolecarboxylicacid,3-Bromo-5-Methyl-(9Ci)
CAS No.	130742-22-2
Molecular Formula	C5H4BrNO3
Molecular Weight	205.99 g/mol
Synonyms	3-Bromo-5-methyl-4-isoxazolecarboxylic acid; 3-Bromo-5-methylisoxazole-4-carboxylic acid; 4-Isoxazolecarboxylic acid, 3-bromo-5-methyl-; 3-Bromo-5-methyl-1,2-oxazole-4-carboxylic acid; 130742-22-2; AI3-52375; BRN 1182871; SCHEMBL1182871; ZINC000004098756
EINECS	Contact for details

Quality Control

Every batch of 3-Bromo-5-methylisoxazole-4-carboxylic acid is manufactured under a strict quality management system. We provide comprehensive analytical documentation, including a Certificate of Analysis (COA) detailing purity, identity, and impurity profiles verified by techniques such as HPLC, NMR, and mass spectrometry. Our quality commitment ensures consistency and reliability for your critical research and development processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept sealed and away from direct light exposure to maintain stability and purity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Assay (HPLC)	≥97.0%
Water Content (KF)	≤1.0%
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.