CAS · 92-71-7
Product Overview
2,5-Diphenyloxazole is a high-purity dyes-pigments supplied for industrial and specialty chemical applications. Contact our team for specifications, packaging options and lead times.
Product Specifications
| Appearance | Pure white crystal/powder |
|---|---|
| Purity (HPLC) | PPO: 99.5% min |
| Individual impurity | 0.1% max |
| Solubility | 4 g of PPO dissolved in 6 g of toluene; solution is clear and transparent without insoluble substances |
| Melting range (DSC) | 76–78 ℃ |
| Loss on drying | 0.2% max |
| Color value | Not lower than European Pharmacopoeia color reference solution BY7 |
| Ash content | 0.1% max |
Applications
2,5-Diphenyloxazole is a heterocyclic aromatic compound widely used in analytical chemistry, radiation detection, and materials science. It is best known as a primary scintillator in liquid scintillation counting systems, where it converts ionizing radiation into measurable light signals for radioactive isotope analysis. In environmental monitoring, biomedical research, and nuclear science, it is applied in the detection and quantification of beta-emitting radionuclides. In photophysical and materials research, 2,5-diphenyloxazole is used as a fluorescent brightener, optical whitening agent, and light-emitting material in polymer matrices and coatings. It is also utilized in organic synthesis and spectroscopy as a reference compound for fluorescence studies and molecular interaction analysis. Additionally, it is incorporated into specialty polymers and thin films for optoelectronic and sensing applications.
Benefits
The benefits of 2,5-diphenyloxazole arise from its high fluorescence efficiency, excellent photostability, and chemical robustness. It exhibits strong ultraviolet absorption and high quantum yield, enabling efficient conversion of radiation or UV energy into visible light. Its rigid aromatic structure provides thermal and chemical stability, supporting long-term performance in scintillation and optical systems. The compound is readily soluble in common organic solvents and compatible with polymer matrices, facilitating formulation in liquid scintillators, resins, and coatings. Its consistent purity and well-defined photophysical properties ensure reproducible results in analytical and research applications. Additionally, it shows low self-quenching behavior at practical concentrations, enhancing detection sensitivity.
Conclusion
2,5-Diphenyloxazole is a highly valuable fluorescent and scintillation compound with broad applications in radiation detection, analytical chemistry, and materials science. Its strong light-emitting efficiency, stability, and compatibility with diverse systems make it an essential component in liquid scintillation counting and optical materials. By supporting accurate radiation measurement, advanced photophysical research, and functional material development, 2,5-diphenyloxazole continues to play a critical role in modern scientific and industrial applications.
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