5-Oxazolecarboxylic acid
5-Oxazolecarboxylic acid (CAS: 118994-90-4, Formula: C4H3NO3) is a heterocyclic organic compound with a molecular weight of 113.07 g/mol. This oxazole derivative serves as a valuable building block in chemical synthesis. It is particularly useful in the construction of more complex heterocyclic structures, finding applications in research and development across various chemical disciplines.
- IUPAC
- Oxazole-5-carboxylic acid
- Synonyms
- Oxazole-5-carboxylic acid

Heterocyclic Synthesis
5-Oxazolecarboxylic acid functions as a key intermediate in the synthesis of diverse heterocyclic compounds, including substituted oxazoles and related ring systems.
Organic Synthesis Building Block
As a versatile building block, it can be employed in multi-step organic syntheses to introduce specific functional groups or structural motifs into target molecules.
Pharmaceutical Research
Its structural features make it a potential starting material or intermediate in the development of novel pharmaceutical agents and drug discovery programmes.
Materials Science
The oxazole core may be incorporated into functional materials where specific electronic or structural properties are desired.
| Molecular weight | 113.07 |
|---|---|
| Empirical formula | C4H3NO3 |
| Assay | 97% |
| Melting point | 226-230 °C |
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 5-Oxazolecarboxylic acid used for?
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5-Oxazolecarboxylic acid is used as a building block in chemical synthesis, particularly for the construction of heterocyclic compounds and in pharmaceutical research.
What is the CAS number and formula for 5-Oxazolecarboxylic acid?
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The CAS number is 118994-90-4, and the empirical formula is C4H3NO3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 5-Oxazolecarboxylic acid with a minimum assay of 97%. We do not represent this product as USP, BP, or EP grade.
What are the safety and handling recommendations for 5-Oxazolecarboxylic acid?
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5-Oxazolecarboxylic acid has a German Water Hazard Class (WGK) of 3, indicating it is a substance hazardous to water. Handle with appropriate personal protective equipment in a well-ventilated area.
How is 5-Oxazolecarboxylic acid packed, shipped, and exported?
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5-Oxazolecarboxylic acid is carefully packed according to industry standards to ensure safe transit. We are experienced in exporting fine chemicals globally.
How can I request a sample or quote for 5-Oxazolecarboxylic acid?
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To request a sample or a quote, please contact our sales team through the website or direct email, providing your specific requirements.
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