Description

4-Methylisoxazole-3-Carboxylic Acid is a versatile heterocyclic building block and key organic intermediate of significant commercial importance. Its unique isoxazole-carboxylic acid structure makes it a critical precursor in the synthesis of complex molecules, particularly in the pharmaceutical and agrochemical sectors. This high-purity compound is essential for research chemists and process development scientists seeking reliable, high-quality raw materials for advanced synthesis.

Application

This specialized carboxylic acid derivative serves as a foundational component in several high-value industrial and research applications:

• Pharmaceutical Intermediate: A key synthon for the development of active pharmaceutical ingredients (APIs), particularly in medicinal chemistry research targeting novel therapeutic agents.
• Agrochemical Synthesis: Used in the production of advanced pesticides, herbicides, and fungicides, leveraging the bioactivity of the isoxazole ring.
• Chemical Research & Development: Serves as a versatile building block for organic synthesis, enabling the construction of complex heterocyclic compounds and fine chemicals.
• Material Science: Potential precursor for functional materials, including ligands for catalysis or components in specialty polymers.

Basic Information

Product Name	4-Methylisoxazole-3-Carboxylic Acid
CAS No.	215872-46-1
Molecular Formula	C5H5NO3
Molecular Weight	127.10 g/mol
Synonyms	3-Isoxazolecarboxylic acid, 4-methyl-; 4-Methyl-1,2-oxazole-3-carboxylic acid; 4-Methylisoxazole-3-carboxylic acid; 4-Methyl-3-isoxazolecarboxylic acid; 4-Methyl-3-carboxyisoxazole; 4-Methylisoxazol-3-ylcarboxylic acid
EINECS	Contact for details

Quality Control

Our 4-Methylisoxazole-3-Carboxylic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets the high-purity standards required for research and industrial synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee traceability and batch-to-batch consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials. Due to its acidic nature, ensure the storage area is separate from strong bases and oxidizing agents. For long-term stability, maintain at controlled room temperature (15-25°C).

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
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.