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Names | |
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Preferred IUPAC name
2,5-Diphenyl-1,3-oxazole | |
Other names
PPO, DPO, POP
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Identifiers | |
ChemSpider | |
ECHA InfoCard | 100.001.984 |
EC Number |
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PubChem CID
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
C15H11NO | |
Molar mass | 221.259 g·mol−1 |
Appearance | greenish powder |
Density | 1.094 g/cm3 (100 °C)[1] |
Melting point | 71 °C (160 °F; 344 K)[1] |
Boiling point | 360 °C (680 °F; 633 K)[1] |
Refractive index (nD)
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1.6231 (100 °C)[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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2,5-Diphenyloxazole (PPO) is an organic scintillator.[2] It is used as a wavelength shifter (also called a "primary shifter" or "fluor"), which means that it converts shorter wavelength light to longer wavelength light. Its output spectrum peaks at 385 nm, which is in the range of UV light.
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