2,5-Diphenyloxazole
2,5-Diphenyloxazole (CAS: 92-71-7) is a valuable organic compound with the molecular formula C15H11NO and a molecular weight of 221.25 g/mol. Known for its luminescent properties, this oxazole derivative is widely utilised as a scintillation reagent in radiation detection. Its high purity, typically 99%, makes it suitable for sensitive analytical applications in spectroscopy and chemical synthesis.
- IUPAC
- DPO,PPO
- Synonyms
- PPO2,5-Diphenyl-1,3-oxazole2,5-DiphenyloxazoleDPO

Scintillation Counting
2,5-Diphenyloxazole is a primary scintillator, efficiently converting ionising radiation into detectable light pulses. It is a key component in liquid and plastic scintillators used in nuclear physics, medical imaging, and environmental monitoring.
Fluorescence Spectroscopy
The compound exhibits strong fluorescence, with an absorption maximum at 303 nm, making it useful as a fluorescent probe or standard in spectroscopic analyses. It aids in quantifying substances or studying molecular interactions.
Organic Synthesis Building Block
As a heterocyclic building block, 2,5-Diphenyloxazole can be incorporated into more complex molecular structures. Its oxazole core is valuable in the development of novel organic materials and pharmaceuticals.
Analytical Chemistry
Its well-defined spectral properties and suitability for scintillation make it a reliable reagent in analytical laboratories for various detection and measurement techniques, particularly in chromatography and related fields.
| Molecular weight | 221.25 |
|---|---|
| Empirical formula | C15H11NO |
| Assay | 99% |
| Boiling point | 360 °C(lit.) |
| Suitability | suitable for scintillation |
| Melting point | 72-74 °C(lit.) |

Hazard statements
- H302Harmful if swallowed
- H319Causes serious eye irritation
- H413May cause long-lasting harmful effects to aquatic life
Precautionary statements
- P305IF IN EYES
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36 |
| Safety statements (S) | 26 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Absorption | λmax 303 nm |
|---|
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 2,5-Diphenyloxazole used for?
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2,5-Diphenyloxazole is primarily used as a scintillation reagent for detecting ionising radiation, and also finds application in fluorescence spectroscopy and as a building block in organic synthesis.
What are the CAS number and formula for 2,5-Diphenyloxazole?
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The CAS number for 2,5-Diphenyloxazole is 92-71-7, and its molecular formula is C15H11NO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2,5-Diphenyloxazole with a minimum purity of 99%. This product is suitable for scintillation and general laboratory use; TSS does not represent it as USP, BP, or EP grade.
How should 2,5-Diphenyloxazole be handled safely?
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Based on GHS classifications, 2,5-Diphenyloxazole is harmful if swallowed (H302) and causes serious eye irritation (H319). It may also cause long-lasting harmful effects to aquatic life (H413). Appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator filter, should be used. Handle in a well-ventilated area.
Is 2,5-Diphenyloxazole a controlled substance?
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There is no indication in the provided data that 2,5-Diphenyloxazole is a controlled substance.
How is 2,5-Diphenyloxazole typically packed and shipped?
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Tech Serve Solutions exports fine chemicals globally, adhering to all relevant shipping regulations. Specific packaging details will be provided upon inquiry.
How can I request a sample or quote for 2,5-Diphenyloxazole?
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To request a sample or a quotation for 2,5-Diphenyloxazole, please contact our sales team through the website or by phone.
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