质量标准
BR , 98.0% 外观Appearance 白色结晶体含量assay 98.0-101.0%氯含量(CL)chlorine,% ≤0.10%重金属(铅)Heavy metals(as Pb) ≤10 PPM干燥失重Loss on drying,% ≤0.20灼烧残渣(硫酸盐)Residue after ignition,% ≤0.20 AR , 99.0% 外观Appearance 白色粉末红外光谱鉴别Infrared spectrometry 和对照品匹配纯度Purity ≥99.0% (TLC) 比旋光度Specific rotation [a]20/D +7.0 ~ +8.0°(C=1, H2O)干燥损失Drying loss ≤0.5 %