3-Hydroxybenzisoxazole
3-Hydroxybenzisoxazole (CAS: 21725-69-9, C7H5NO2) is a heterocyclic organic compound with a molecular weight of 135.12 g/mol. This versatile building block is primarily employed in chemical synthesis, particularly in the development of novel heterocyclic structures. Its defined chemical properties make it a valuable intermediate for researchers and chemists exploring new molecular pathways and applications within organic chemistry.
- IUPAC
- 1,2-Benzisoxazol-3-ol,1,2-Benzisoxazolin-3-one,3-Hydroxy-1,2-benzisoxazole,Benzo[d]isoxazol-3-ol
- Synonyms
- 1,2-Benzisoxazol-3-ol1,2-Benzisoxazolin-3-one3-Hydroxy-1,2-benzisoxazoleBenzo[d]isoxazol-3-ol

Organic Synthesis Intermediate
Utilised as a key building block in complex organic synthesis, facilitating the construction of diverse molecular frameworks. Its reactive nature allows for further functionalisation in multi-step synthetic routes.
Heterocyclic Chemistry Research
Serves as a valuable reagent for academic and industrial research in heterocyclic chemistry. It enables the exploration of novel oxazole derivatives and related fused ring systems.
Pharmaceutical Intermediate Development
Potentially employed in the early stages of drug discovery and development as an intermediate for synthesising biologically active compounds. Its structure can be incorporated into lead optimisation strategies.
| Molecular weight | 135.12 |
|---|---|
| Empirical formula | C7H5NO2 |
| Assay | 97% |
| Melting point | 140-145 °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 3-Hydroxybenzisoxazole used for?
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3-Hydroxybenzisoxazole (CAS: 21725-69-9) is primarily used as a building block and intermediate in organic synthesis and heterocyclic chemistry research.
What are the CAS number and formula for 3-Hydroxybenzisoxazole?
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The CAS number for 3-Hydroxybenzisoxazole is 21725-69-9, and its empirical formula is C7H5NO2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3-Hydroxybenzisoxazole with an assay of 97%. This product is intended for research and chemical synthesis purposes and is not represented as USP, BP, or EP grade.
What are the safety considerations for handling 3-Hydroxybenzisoxazole?
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3-Hydroxybenzisoxazole has a WGK Germany rating of 3, indicating it is hazardous to water. Handle with appropriate personal protective equipment in a well-ventilated area. Consult the Safety Data Sheet (SDS) for detailed handling and hazard information.
Is 3-Hydroxybenzisoxazole a controlled substance?
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Based on the provided data, there is no indication that 3-Hydroxybenzisoxazole is a controlled substance.
How is 3-Hydroxybenzisoxazole packed, shipped, and exported?
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3-Hydroxybenzisoxazole is carefully packed to ensure stability during transit and is available for global export by Tech Serve Solutions, adhering to international shipping regulations for chemical compounds.
How can I request a sample or quote for 3-Hydroxybenzisoxazole?
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To request a sample or obtain a quote for 3-Hydroxybenzisoxazole, please contact our sales department through the website or by calling our customer service line. Provide the CAS number (21725-69-9) for prompt service.
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