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5-Methylisoxazole-4-carboxylic acid (CAS 4338-66-1) is a vital building block in the API intermediates market, primarily utilized for the synthesis of Leflunomide and other immunomodulatory agents where high purity fine chemicals (Pharma/API purity 99% | General Industry purity 98%) are essential for therapeutic efficacy. 4-Isoxazolecarboxylic acid, 5-methyl- serves as a high-performance precursor in the current shift toward strategic global sourcing, as CDMOs increasingly require custom synthesis services that provide rigorous impurity profiling and analytical validation to meet stringent regulatory standards. 5-Methyl-4-isoxazolecarboxylic acid remains a preferred choice for advanced process development and bulk chemical supplier procurement, reflecting a growing industry demand for reliable precursors that optimize yields in large-scale commercial manufacturing while maintaining precise crystalline morphology for downstream stability (Pharma/API purity 99% | General Industry purity 98%). We are an globally established 5-Methyl-4-isoxazolecarboxylic acid intermediates supplier with >= 99% purity, ensuring minimal carry-over of impurities in the final API, and a broad range of various pharmaceutical intermediates for API manufacturers and finished formulators, providing comprehensive analytical (HPLC/NMR/MS) and supporting 5-Methyl-4-isoxazolecarboxylic acid COA/TDS/SDS region-specific regulatory support. reliable lead times, worldwide supply chain capabilities
5-Methylisoxazole-4-carboxylic acid (CAS 4338-66-1) is a vital building block in the API intermediates market, primarily utilized for the synthesis of Leflunomide and other immunomodulatory agents where high purity fine chemicals (Pharma/API purity 99% | General Industry purity 98%) are essential for therapeutic efficacy. 4-Isoxazolecarboxylic acid, 5-methyl- serves as a high-performance precursor in the current shift toward strategic global sourcing, as CDMOs increasingly require custom synthesis services that provide rigorous impurity profiling and analytical validation to meet stringent regulatory standards. 5-Methyl-4-isoxazolecarboxylic acid remains a preferred choice for advanced proce...
Chemical Properties & Specifications
P261, P264, P264+P265, P270, P271, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P305+P354+P338, P317, P319, P321, P330, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501
Skin Irrit. 2 (53.8%)
Eye Dam. 1 (30.8%)
A key building block utilized in the commercial synthesis of autoimmune disorder medications, specifically acting as the primary precursor for the production of Leflunomide and Teriflunomide
A functionalized heterocyclic compound employed in the formulation of herbicides and fungicides to enhance efficacy and improve crop yields
A versatile isoxazole derivative used in academic and industrial research for the development of bioactive molecules and novel peptidomimetics
A high-purity reference material used in analytical chemistry for the quantification of related substances and identification of impurities in pharmaceutical manufacturing.
5-Methyl-4-isoxazolecarboxylic acid, also known as 5-methylisoxazole-4-carboxylic acid, is a heterocyclic organic compound that serves as a key pharmaceutical intermediate, particularly in the synthesis of Leflunomide and Teriflunomide for treating autoimmune diseases like rheumatoid arthritis
This compound is primarily used in the pharmaceutical and agrochemical industries for drug discovery, the production of anti-inflammatory medications, and the formulation of herbicides
It is soluble in organic solvents like methanol and ethanol, and is typically used as a building block in liquid-phase chemical synthesis and derivatization reactions such as esterification and amidation
Standard specifications include CAS number 42831-50-5, molecular weight 127.10, high purity (typically ≥98.5% or ≥99%), and documentation such as COA, TDS, impurity reports, and regulatory compliance documents
Scimplify has capabilities for global distribution and custom synthesis through an integrated network of manufacturers and logistics partners with reliable lead time
The product is export ready with a standard MOQ starting from 100 kgs, with lead times for international customers depending on the shipping destination and specific grade.
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