Min. Order: 1
检验项目（Text ltems） 标准规定(Specification) 检验结果(Result)
性状 White to practically white, odorless or practically White crystalline
(Description) Odorless ,Power Power
鉴别
(Identfication) Shall comply with USP31 tests,A and B Complies
旋光度
(Specific rotation) Between -11.7º and -12.5º -11.84º
炽灼残渣
(Residue on ignition) Not more than 0.1% 0.03%
重金属
（Heavy Metal） Not more than 0.002% <0.002%
干燥失重
(Loss on drying) Not more than 0.5% 0.08%

pH(20mg/ml) Between 3.8 and 4.3 4.0
色谱纯度 No secondary spot is more intense than 0.4% and
（Chromatographic the sum of the intensities of the secondary spots,
purity) excluding any having intensities less than 0.1%,
does not exceed 1.0% Complies
含量测定
（Assay） Not less than 98.0% and not more than 101.0% 99.6%