Description

5-Isoxazolecarboxylic Acid, 3-Ethyl-4-Methyl- is a heterocyclic carboxylic acid building block of significant interest in advanced organic synthesis. Its unique isoxazole core functionalized with alkyl and carboxylic acid groups makes it a versatile intermediate for constructing complex molecular architectures. This compound is primarily sought by research and development teams in the pharmaceutical and agrochemical sectors for the development of new active ingredients.

Application

• Pharmaceutical Intermediate: A key synthon for the research and development of novel drug candidates, particularly those targeting central nervous system (CNS) disorders, anti-inflammatory agents, and antimicrobials.
• Agrochemical Synthesis: Serves as a crucial building block in the design and synthesis of new herbicides, fungicides, and insecticides, leveraging the bioactivity of the isoxazole ring.
• Ligand and Catalyst Development: Used in academic and industrial research to create novel chelating ligands or organocatalysts for asymmetric synthesis and metal-organic frameworks (MOFs).
• Material Science Research: Employed in the synthesis of specialty polymers and functional organic materials that require specific heterocyclic components for electronic or photonic properties.
• Chemical Biology Probe: Utilized as a scaffold for developing molecular probes to study enzyme function and biological pathways.

Basic Information

Product Name	5-Isoxazolecarboxylic Acid, 3-Ethyl-4-Methyl-
CAS No.	874289-75-5
Molecular Formula	C7H9NO3
Molecular Weight	155.15 g/mol
Synonyms	3-Ethyl-4-methyl-1,2-oxazole-5-carboxylic acid; 3-Ethyl-4-methylisoxazole-5-carboxylic acid; 4-Methyl-3-ethylisoxazole-5-carboxylic acid; 5-Carboxy-3-ethyl-4-methylisoxazole; 3-Ethyl-4-methyl-5-carboxyisoxazole; 874289-75-5; 5-Isoxazolecarboxylic acid, 3-ethyl-4-methyl-
EINECS	Contact for details

Quality Control

Our 5-Isoxazolecarboxylic Acid, 3-Ethyl-4-Methyl- is produced under strict quality management protocols to ensure batch-to-batch consistency and high purity suitable for research and scale-up applications. Each lot undergoes comprehensive analytical characterization, including HPLC, NMR, and mass spectrometry. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory documentation needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Keep away from strong acids and organic solvents. For long-term storage, consider inert atmosphere conditions to maintain optimal stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Melting Point	Contact for details
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.