Description

3-(5-Chloro-2-Thienyl)-5-Methylisoxazole-4-Carboxylic Acid is a high-purity heterocyclic carboxylic acid building block of significant importance in advanced organic synthesis. Its core value lies in its unique molecular architecture, combining thiophene, isoxazole, and carboxylic acid functionalities, which makes it a versatile intermediate for constructing complex pharmacologically active molecules. This compound is primarily needed by research and development chemists in the pharmaceutical and agrochemical industries for the synthesis of novel active ingredients and fine chemicals.

Application

• Pharmaceutical Intermediate: A key synthon for the research and development of new drug candidates, particularly in medicinal chemistry programs targeting various therapeutic areas.
• Agrochemical Synthesis: Used in the production of advanced crop protection agents, such as herbicides and fungicides, leveraging its heterocyclic core.
• Chemical Research & Development: Serves as a versatile building block in academic and industrial labs for exploring new chemical spaces and synthesizing complex heterocyclic compounds.
• Material Science Precursor: Potential use in the synthesis of specialty polymers or organic electronic materials that incorporate functionalized thiophene and isoxazole units.

Basic Information

Product Name	3-(5-Chloro-2-Thienyl)-5-Methylisoxazole-4-Carboxylic Acid
CAS No.	14345-96-1
Molecular Formula	C9H6ClNO3S
Molecular Weight	243.67 g/mol
Synonyms	5-Methyl-3-(5-chloro-2-thienyl)-4-isoxazolecarboxylic acid; 3-(5-Chloro-2-thienyl)-5-methyl-4-isoxazolecarboxylic acid; 4-Isoxazolecarboxylic acid, 3-(5-chloro-2-thienyl)-5-methyl-; 5-Methyl-3-(5-chlorothiophen-2-yl)isoxazole-4-carboxylic acid; 3-(5-Chlorothiophen-2-yl)-5-methylisoxazole-4-carboxylic acid; 5-Methyl-3-(5-chloro-2-thienyl)isoxazole-4-carboxylic acid; 3-(5-Chloro-2-thienyl)-5-methyl-1,2-oxazole-4-carboxylic acid
EINECS	Contact for details

Quality Control

Our 3-(5-Chloro-2-Thienyl)-5-Methylisoxazole-4-Carboxylic Acid is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation (IR, NMR), to ensure it meets the high standards required for research and synthesis applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (typically 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)	≥ 97.0% (Area %)
Melting Point	Contact for details
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%

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