质量标准
99%: 外观Appearance 白色无嗅结晶或粉末红外光谱鉴定Infrared spectrometry 和对照品匹配 纯度Purity ≥99.0% (HPLC) 水溶性实验Solubility in Water 溶液透明(10%水溶液)干燥损失Loss on drying <0.45 % 重金属Heavy metals (as Pb) <10 ppm 比旋度Specific rotation [a]20/D +13.5°~ +14.9°(c=10, 水) 内毒素endotoxins (LAL): 0.5 E.U. /1 ml 0.1% 溶液 品级Grade 细胞培养级,≥99 % (for cell culture,≥99 %) 外观Appearance White to Off-White Powder 水溶性Solubility Colorless to Very Faint Yellow , Clear ,50 mg/ml, H2O 比旋度Specific rotation [a]20/D 13.5 - 14.9 ° (C = 4 in H2O ,25 deg C after 24 hours )纯度Purity (GC) ≥99 % 细胞培养测试Cell Culture Test Pass