Description

5-(1-Ethyl-5-Methyl-1 H-Pyrazol-4-Yl)-Isoxazole-3-Carboxylic Acid is a high-purity heterocyclic building block and advanced pharmaceutical intermediate. This compound is valued for its precise molecular architecture, which is critical for synthesizing novel active pharmaceutical ingredients (APIs) and agrochemicals. It is primarily sought by research institutions and manufacturers in the pharmaceutical, agrochemical, and specialty chemical sectors for developing new therapeutic and crop protection agents.

Application

• Pharmaceutical Intermediate: A key synthon in the research and development of new drug candidates, particularly in medicinal chemistry programs.
• Agrochemical Synthesis: Used as a building block for creating novel herbicides, fungicides, and insecticides with specific modes of action.
• Chemical Research: Serves as a versatile scaffold in organic synthesis and method development for constructing complex heterocyclic systems.
• Material Science: Potential precursor for the development of specialty polymers and functional materials with tailored properties.

Basic Information

Product Name	5-(1-Ethyl-5-Methyl-1 H-Pyrazol-4-Yl)-Isoxazole-3-Carboxylic Acid
CAS No.	957487-32-0
Molecular Formula	C10H11N3O3
Molecular Weight	221.21 g/mol
Synonyms	5-(1-Ethyl-5-methylpyrazol-4-yl)isoxazole-3-carboxylic acid; 5-(1-Ethyl-5-methyl-1H-pyrazol-4-yl)-1,2-oxazole-3-carboxylic acid; 5-(1-Ethyl-5-methyl-1H-pyrazol-4-yl)isoxazole-3-carboxylic acid; 957487-32-0; Isoxazole-3-carboxylic acid, 5-(1-ethyl-5-methyl-1H-pyrazol-4-yl)-; 5-(1-Ethyl-5-methyl-1H-1,2-diazol-4-yl)-1,2-oxazole-3-carboxylic acid
EINECS	Contact for details

Quality Control

Our 5-(1-Ethyl-5-Methyl-1 H-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. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each shipment 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 controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Conforms to reference
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%
Related Substances (HPLC)	Total impurities ≤ 2.0% Any single impurity ≤ 0.5%

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