外观Appearance white to off-white powder, crystals 红外光谱Infrared spectrometry Conforms to Structure 核磁Proton NMR spectrum Conforms to Structure 纯度Purity(Titration by AgNO3) 96.5%-103.5% 纯度Purity(Nonaqueous Titration) 96.5%-103.5% 水分Water (by Karl Fischer) ≤3%