2-Methyl-4,5-diphenyloxazole is primarily used as a scintillator and wavelength shifter in liquid and plastic scintillators for detecting ionizing radiation, such as beta particles and gamma rays. It absorbs high-energy radiation and emits visible blue fluorescence, enabling the measurement of low-level radioactivity. This compound is widely employed in nuclear physics research, radiation detection equipment like scintillation counters, and analytical chemistry for high-sensitivity assays. It also finds applications in certain luminescent materials and fluorescent probes.