项 目 Item |
标 准 Specifications |
外观 Appearance |
White crystalline powder |
含量(干基), Assay, |
98.5%~101.5% |
pH值 pH value |
5.4 to 6.0 |
比旋光度 Specific Rotation |
-32.7O ~ -34.7O |
干燥失重, Loss on drying , |
Not more than 0.30% |
重金属(以Pb计) Heavy metals(as Pb) |
Not more than 15PPM |
炽灼残渣, Residue on ignition, |
Not more than 0.4% |
氯化物(以Cl计), Chloride (as Cl) |
Not more than 0.05% |
硫酸盐(以SO4计), Sulfate(asSO4), |
Not more than 0.03% |
铁(以Fe计), Iron (Fe) , |
Not more than 0.003% |
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