外观Appearance White Powder 红外光谱鉴别Infrared spectrometry Conforms to Structure 纯度Purity ≥95.0% (HPLC) 纯度Purity ≥98.0% (uv-vis) 水溶解试验solubility in water clear,50mg/ml in water 水分water ≤10%by karl fischer Em (280nm, pH 2.0) >12400 溶剂含量solvent content ≤ 7%