98%:外观Appearance 白色至类白色结晶粉末 纯度Purity >98.0% (离子交换滴定) 水溶解试验solubility in water Clear, 400 mg /4 mL H2O 水分Water ≤2 % (by Karl Fischer) pH(100g/L,25℃) 5.5~7.5 品级Grade 离子色谱级 (Ion pair chromatography) 外观Appearance 白色结晶粉末 红外光谱鉴别Infrared spectrometry Conforms 纯度Purity ≥98.0% (离子交换滴定) 干燥损失Loss on drying <2 % (150°C) 紫外吸收UV absorption 210 nm A: <0.1 (C=0.5 M in water) 220 nm A: <0.06 (C=0.5 M in water) 230 nm A: <0.04 (C=0.5 M in water) 260 nm A: <0.02 (C=0.5 M in water) Suitability test (HPLC, gradient) Passes Membrane filtration test: Passes test on 0.5 M sol
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