Description

5-Isoxazolecarboxylicacid,4-Methyl-,Methylester(9Ci) is a high-purity heterocyclic building block and ester derivative of isoxazole, identified by CAS NO 261350-48-5. This compound is a critical intermediate in advanced organic synthesis, valued for its reactive ester group and stable isoxazole core which facilitates the construction of complex molecular architectures. It is primarily sought after by research institutions and manufacturers in the pharmaceutical and agrochemical sectors for the development of novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: Serves as a key synthon in the research and development of new drug candidates, particularly for molecules containing the isoxazole pharmacophore.
• Agrochemical Synthesis: Used in the production of advanced pesticides and herbicides, where the isoxazole ring contributes to biological activity.
• Organic Synthesis Building Block: Employed in academic and industrial R&D for constructing complex heterocyclic compounds and fine chemicals.
• Material Science Research: Acts as a precursor for specialty polymers or functional materials requiring specific heterocyclic components.
• Chemical Reference Standard: Supplied as a high-purity standard for analytical method development and quality control in chemical production.

Basic Information

Product Name	5-Isoxazolecarboxylicacid,4-Methyl-,Methylester(9Ci)
CAS No.	261350-48-5
Molecular Formula	C6H7NO3
Molecular Weight	141.13 g/mol
Synonyms	Methyl 4-methyl-1,2-oxazole-5-carboxylate; 4-Methylisoxazole-5-carboxylic acid methyl ester; 5-Carbomethoxy-4-methylisoxazole; Methyl 4-methylisoxazole-5-carboxylate; 4-Methyl-5-methoxycarbonylisoxazole; 261350-48-5; 4-Methyl-1,2-oxazole-5-carboxylic acid methyl ester
EINECS	Contact for details

Quality Control

Our production of 5-Isoxazolecarboxylicacid,4-Methyl-,Methylester(9Ci) adheres to stringent internal quality standards to ensure batch-to-batch consistency and high chemical purity. Each lot is analyzed using advanced chromatographic and spectroscopic techniques. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment and is available upon request.

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 incompatible materials such as strong bases and organic solvents. For long-term storage, consider storing under an inert atmosphere to maintain optimal purity.

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%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.