Description

5-Isoxazolecarboxylic Acid, 3-Phenyl-, Methyl Ester is a versatile heterocyclic building block with significant value in advanced organic synthesis. Its core structure makes it a critical intermediate for developing novel compounds in the pharmaceutical and agrochemical sectors. This product is essential for research chemists and process development scientists working on active pharmaceutical ingredients (APIs), crop protection agents, and functional materials.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of novel drug candidates, particularly those targeting central nervous system (CNS) disorders and anti-inflammatory applications.
• Agrochemical Synthesis: Used in the research and development of new herbicides and fungicides, leveraging the isoxazole ring's bioactivity.
• Chemical Research & Development: Serves as a versatile scaffold for constructing complex heterocyclic libraries in medicinal chemistry and material science.
• Ligand and Catalyst Development: Employed in the preparation of specialized ligands for metal-catalyzed reactions due to its coordinating functional groups.
• Fine Chemical Production: Integral to the multi-step synthesis of high-value, specialty chemicals for various industrial applications.

Basic Information

Product Name	5-Isoxazolecarboxylic Acid, 3-Phenyl-, Methyl Ester
CAS No.	1081-30-7
Molecular Formula	C11H9NO3
Molecular Weight	203.19 g/mol
Synonyms	Methyl 3-phenyl-1,2-oxazole-5-carboxylate; Methyl 3-phenylisoxazole-5-carboxylate; 3-Phenyl-5-isoxazolecarboxylic acid methyl ester; 5-Carbomethoxy-3-phenylisoxazole; 3-Phenylisoxazole-5-carboxylic acid methyl ester; 1081-30-7; Methyl 3-phenyl-5-isoxazolecarboxylate
EINECS	Contact for details

Quality Control

Every batch of 5-Isoxazolecarboxylic Acid, 3-Phenyl-, Methyl Ester is produced and tested under a strict quality management system. We ensure high purity and batch-to-batch consistency through advanced analytical techniques including HPLC, GC, and NMR. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to support your quality and regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and strong bases.

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.