Description

5-Isoxazolecarboxylicacid,4-Methyl-,Ethylester(9Ci) CAS NO 261350-50-9 is a high-purity heterocyclic building block and ester derivative of a substituted isoxazole carboxylic acid. This compound is valued for its role as a versatile synthetic intermediate in advanced organic synthesis, enabling the construction of complex molecular architectures. It is primarily sought by research and development teams in the pharmaceutical and agrochemical industries for the creation of novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of novel drug candidates, particularly those targeting central nervous system (CNS) disorders and anti-inflammatory pathways.
• Agrochemical Research: Used in the development of new herbicides, fungicides, and insecticides, leveraging the bioactive isoxazole scaffold.
• Chemical Synthesis: Serves as a versatile precursor for the preparation of amides, hydrazides, and other derivatives through reactions at the ester functional group.
• Material Science: Employed in the research of specialty polymers and organic electronic materials where the isoxazole ring contributes to specific electronic properties.
• Academic & Contract Research: Essential for methodological development and discovery chemistry in university and contract research organization (CRO) laboratories.

Basic Information

Product Name	5-Isoxazolecarboxylicacid,4-Methyl-,Ethylester(9Ci)
CAS No.	261350-50-9
Molecular Formula	C7H9NO3
Molecular Weight	155.15 g/mol
Synonyms	Ethyl 4-Methyl-1,2-oxazole-5-carboxylate; 4-Methyl-5-Isoxazolecarboxylic Acid Ethyl Ester; Ethyl 4-Methylisoxazole-5-carboxylate; 4-Methylisoxazole-5-carboxylic acid ethyl ester; 5-Carbethoxy-4-methylisoxazole; 261350-50-9; 4-Methyl-1,2-oxazole-5-carboxylic acid ethyl ester
EINECS	Contact for details

Quality Control

Every batch of 5-Isoxazolecarboxylicacid,4-Methyl-,Ethylester(9Ci) is produced and tested under a strict quality management system. We guarantee consistent high purity and identity confirmed by modern analytical techniques. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment to ensure it meets your specific research or production requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). Keep away from heat, sparks, and open flame. For long-term storage, consider under an inert atmosphere to maintain optimal purity.

Specification

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