项目Item 检测标准Test Criterion 结果Result 外观Appearance 白色至类白色粉末 white to off-white Powder 符合Conforms 含量Assay min 99.0% 99.7% 比旋度Specific rotation +19°~+22°(C=4,H2O) +21.8° 灼烧残渣Residue on ignition max 0.4% 0.2% 干燥失重Loss on drying max 0.50% 0.20% 注意事项Note 干燥密封保存Sealed dry preservation 结论CONCLUSION: This batch meets the test criterion.