Description

5-(1-Ethyl-1H-Pyrazol-4-Yl)-Isoxazole-3-Carboxylic Acid is a high-purity, heterocyclic carboxylic acid building block of significant interest in advanced organic synthesis. This compound matters as a versatile and critical intermediate for constructing complex molecular architectures, particularly in the development of novel active pharmaceutical ingredients (APIs). It is primarily needed by research institutions and pharmaceutical companies engaged in medicinal chemistry, agrochemical research, and the synthesis of functional materials.

Application

• Pharmaceutical Intermediate: A key synthon for the research and development of new drug candidates, particularly in kinase inhibitor and other targeted therapeutic programs.
• Agrochemical Synthesis: Used in the creation of novel herbicides, fungicides, and insecticides, leveraging its unique heterocyclic structure for bioactivity.
• Chemical Research & Development: Serves as a versatile building block in academic and industrial R&D for exploring new chemical entities and reaction pathways.
• Material Science Precursor: Potential use in the synthesis of organic ligands for metal-organic frameworks (MOFs) or functional polymers.
• Custom Synthesis & Contract Manufacturing: Supplied to CDMOs (Contract Development and Manufacturing Organizations) for the production of client-specific target molecules.

Basic Information

Product Name	5-(1-Ethyl-1H-Pyrazol-4-Yl)-Isoxazole-3-Carboxylic Acid
CAS No.	957487-31-9
Molecular Formula	C9H9N3O3
Molecular Weight	207.19 g/mol
Synonyms	5-(1-Ethyl-1H-pyrazol-4-yl)-1,2-oxazole-3-carboxylic acid; 5-(1-Ethyl-1H-pyrazol-4-yl)isoxazole-3-carboxylic acid; 3-Isoxazolecarboxylic acid, 5-(1-ethyl-1H-pyrazol-4-yl)-; 957487-31-9; 5-(1-Ethyl-1H-pyrazol-4-yl)isoxazol-3-carboxylic acid; 5-(1-Ethylpyrazol-4-yl)isoxazole-3-carboxylic acid; 5-(1-Ethyl-1H-4-pyrazolyl)-3-isoxazolecarboxylic acid
EINECS	Contact for details

Quality Control

Our 5-(1-Ethyl-1H-Pyrazol-4-Yl)-Isoxazole-3-Carboxylic Acid is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including HPLC, NMR, and mass spectrometry, to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing all specifications are provided and available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (typically 15-25°C). Keep away from incompatible materials such as strong bases and oxidizing agents. Due to its acid nature, handle with appropriate engineering controls.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (HPLC/MS)	Conforms
Assay (HPLC)	≥97.0%
Water Content (KF)	≤0.5%
Residue on Ignition	≤0.1%
Related Substances (HPLC)	Total impurities ≤3.0% Any single impurity ≤1.0%

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