3-(4-Fluorophenyl)-5-methylisoxazole-4-carboxylic acid
3-(4-Fluorophenyl)-5-methylisoxazole-4-carboxylic acid (CAS: 1736-21-6; Formula: C11H8FNO3; Molar Mass: 221.18) is a fluorinated heterocyclic building block. It serves as a key intermediate in the synthesis of complex organic molecules. This compound is valuable in research and development settings, particularly for constructing novel chemical entities with potential applications in medicinal chemistry and materials science.

Organic Synthesis
Utilised as a versatile building block for the construction of more complex organic structures. Its isoxazole core and fluorophenyl substituent offer specific reactivity for derivatisation.
Medicinal Chemistry Research
Incorporated into the design and synthesis of novel pharmaceutical candidates. The fluorophenyl and isoxazole moieties can influence pharmacokinetic and pharmacodynamic properties.
Materials Science
Investigated for its potential use in the development of new functional materials where its unique structural features may impart desirable properties.
| Molecular weight | 221.18 |
|---|---|
| Empirical formula | C11H8FNO3 |
| Assay | 97% |
| Storage temperature | 2-8°C |
| Melting point | 198-202 °C |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 3-(4-Fluorophenyl)-5-methylisoxazole-4-carboxylic acid used for?
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This compound is primarily used as a building block in organic synthesis and for research in medicinal chemistry and materials science.
What is the CAS number and chemical formula for this compound?
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The CAS number is 1736-21-6, and the chemical formula is C11H8FNO3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this chemical with an assay of 97%. We do not represent it as USP, BP, EP, or other pharmacopoeial grades.
What are the safety and handling precautions for this chemical?
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This chemical requires the use of eyeshields, gloves, and a type N95 (US) or type P1 (EN143) respirator filter. It is classified under WGK Germany 3, indicating a hazard to water.
How is this chemical shipped and exported?
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Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, pharmaceutical intermediates, and laboratory reagents, capable of handling international shipments.
How can I request a quote or sample?
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To request a quote or sample, please contact our sales team through the website or by phone.
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