5-(4-Methylphenyl)isoxazole-3-carboxaldehyde
5-(4-Methylphenyl)isoxazole-3-carboxaldehyde (CAS: 640292-02-0; C11H9NO2) is a heterocyclic aldehyde with a molecular weight of 187.19 g/mol. This compound functions as a versatile building block in organic synthesis, particularly for the construction of more complex molecules. It is supplied by Tech Serve Solutions with a minimum assay of 97%. Its utility spans research and development activities within the chemical and pharmaceutical sectors.

Organic Synthesis Intermediate
Serves as a key intermediate in the synthesis of diverse organic compounds. The aldehyde functionality allows for various transformations, including condensations, reductions, and oxidations.
Heterocyclic Chemistry
As an isoxazole derivative, it is valuable for the preparation of novel heterocyclic structures. These structures can be explored for potential biological activities or material science applications.
Building Block for Complex Molecules
This compound can be incorporated into larger molecular frameworks. It is particularly useful in medicinal chemistry for scaffold development and lead optimization.
| Molecular weight | 187.19 |
|---|---|
| Empirical formula | C11H9NO2 |
| Assay | 97% |
| Melting point | 69-73 °C(lit.) |

Hazard statements
- H302Harmful if swallowed
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36/37/38 |
| Safety statements (S) | 26-36/37/39 |
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 5-(4-Methylphenyl)isoxazole-3-carboxaldehyde used for?
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5-(4-Methylphenyl)isoxazole-3-carboxaldehyde is primarily used as a building block and intermediate in organic synthesis, particularly within heterocyclic chemistry and for constructing complex organic molecules.
What is the CAS number and formula for this compound?
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The CAS number is 640292-02-0 and the molecular formula is C11H9NO2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this compound with a minimum assay of 97%. It is typically considered a research or technical grade; TSS does not represent it as USP, BP, or EP grade.
How should 5-(4-Methylphenyl)isoxazole-3-carboxaldehyde be handled?
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This compound is classified as a Warning with hazards H302 (Harmful if swallowed), H315 (Causes skin irritation), H319 (Causes serious eye irritation), and H335 (May cause respiratory irritation). Handle with appropriate personal protective equipment including a dust mask (N95), eyeshields, and gloves. Ensure good ventilation.
Is this compound a controlled substance?
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Based on the provided data, there is no indication that 5-(4-Methylphenyl)isoxazole-3-carboxaldehyde is a controlled substance.
How is this chemical packed and exported?
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Tech Serve Solutions packs and exports fine chemicals adhering to international shipping regulations to ensure safe transit. Specific packaging details depend on quantity and destination.
How can I request a sample or a quote?
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To request a sample or a quote for 5-(4-Methylphenyl)isoxazole-3-carboxaldehyde, please contact our sales team via the website or direct email, providing your specific requirements.
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