POPOP or 1,4-bis(5-phenyloxazol-2-yl) benzene is a scintillator. It is used as a wavelength shifter (also called a \"secondary scintillator\"), which means that it converts shorter wavelength light to longer wavelength light. Its output spectrum peaks at 410 nm, which is violet. POPOP is used in both solid and liquid organic scintillators.

CAS：1806-34-4
中文别名：双5-苯氧基苯;1,4-双[2-(5-苯基恶唑基)]苯;1,4-双(5-苯基-2-噁唑基)苯;POPOP;1,4-双(苯膦)丙烷;1,4-二(5-苯基-2-恶唑基)苯;1,4-双(5-苯基-2-恶唑基)苯;1,4-双(5-苯基-2-恶唑)苯;2,2\'-(1,4-亚苯基)双(5-苯基恶唑);1,4-双(5-苯基-2-噁唑)苯;1,4-双(5-苯基-2-恶唑基)苯(POPOP);1,4-双(5-苯基唑)苯;1,4-双(5-苯基噁唑-2-基)苯;
英文别名：1,4-Bis(5-phenyl-2-oxazolyl)benzene;p-Bis(5-phenyloxazol-2-yl)benzene;1,4-Di(5-phenyl-2-oxazolyl)benzene;5,5\'-Diphenyl-2,2\'-p-phenylenebis(oxazole);5,5\'-diphenyl-2,2\'-(p-phenylene)di-1,3-oxazole;1,4-Bis(5-phenyloxazol-2-yl)benzene;1,4-bis(5-phenyloxazol-2-yl)-benzene;5-phenyl-2-[4-(5-phenyl-1,3-oxazol-2-yl)phenyl]-1,3-oxazole;1,4-Bis[2-(5-phenyloxazolyl)]benzene;1,4-bis-[5-phenyl-(oxazolyl)]benzene;2,2\'-p-Phenylenebis(5-phenyloxazole);
分子式：C24H16N2O2
分子量：364.396
精确质量：364.121
Psa：52.06
Logp：6.3306

EINECS号：217-304-6
MDL号：MFCD00005309

外观与性状：黄色至黄色-绿色结晶固体
密度：1.204g/cm3
沸点：585.1ºC at 760mmHg
熔点：242-246°C(lit.)
闪点：307ºC
储存条件：Store at RT.

安全说明：S22-S24/25-S26
危险类别码：R22
WGK Germany：3
海关编码：2934999090
危险品标志：Xn

用途
有机闪烁剂，适用于液体发光光谱。