99%:
外观Appearance White Powder or crystal
红外光谱Infrared spectrometry Conforms to Structure
熔点Melting point 263°C - 264°C
纯度Purity 99.0 - 101.0 % (以干基计)
干燥损失Loss on drying <0.3 % (105°C, 3 小时)
重金属Heavy metals (as Pb) <10 ppm
硫酸盐灰分Sulfated ash <0.1 %
比旋度Specific rotation [a]20/D +20.5° - +21.5° (c=8, 6 N HCl)
痕量分析Trace analysis :
硫酸根SO4 < 200 PPM
氨基NH4 < 200 PPM
砷As < 1 PPM
铁Fe < 30 PPM
透光度Transmittance >95 % (c=10, H2O, 430 nm) 1 cm cell
其它氨基酸Foreign amino acids <0.5 % (TLC, 50 ug 点样)
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