项 目 Item |
标 准 Specifications |
外观 Appearance |
White crystals or crystalline powder |
含量(干基), Assay, |
99.0%~101.0% |
pH值 pH value |
3.5 to 4.5 |
比旋光度 Specific Rotation |
+8.9O ~+9.5O |
干燥失重, Loss on drying , |
Not more than 0.20% |
重金属(以Pb计) Heavy metals(as Pb) |
Not more than 10PPM |
炽灼残渣, Residue on ignition, |
Not more than 0.10% |
氯化物(以Cl计), Chloride (as Cl) |
16.66% to 17.08% |
硫酸盐(以SO4计), Sulfate(asSO4), |
Not more than 0.020% |
砷 (以As计), Arsenic(as As), |
Not more than 1PPM |
铵盐(以NH4计), Ammonium (as NH4), |
Not more than 0.02% |
溶液澄清度 State of solution |
Clear and clolorless Not less than 98.0% |
铁(以Fe计), Iron (Fe) , |
Not more than 10PPM |
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