Q/(HG)SK 758-1998
项目Item                                                        分析纯(AR)    
含量Assay by Titration with NAOH,%              ≥ 99.5-100.5
纯度Purity(HPLC)                                           ≥99.0%    
熔点范围Melting range,℃                               151.0-153.0(1,5)  
醇不溶物Insoluble in alcohol,%                       ≤ 0.02  
灼烧残渣(以硫酸盐计)Ignition residue,%        ≤ 0.01  
硫酸盐(SO₄)Sulfate,%　                                ≤ 0.01  
重金属(以Pb计)Heavy metals,%                    ≤ 0.001  

药用级, 99.6-101.0%
含量assay                                             99.6-101.0% (dry basis)
重金属heavy metals (as Pb)                  ≤0.001%
水分water (Karl Fischer)                        ≤0.2%
干燥失重loss on drying                         ≤0.2%
熔点Melting point                                  151-154 °C
阴离子anion traces
氯chloride (Cl-)                                    ≤50 mg/kg
硝酸根nitrate (NO3-)                           ≤30 mg/kg
硫酸根sulfate (SO42-)                         ≤500 mg/kg
阳离子cation traces
砷As                                                    ≤3 mg/kg
铁Fe                                                    ≤5 mg/kg
汞Hg                                                   ≤1 mg/kg
适用性suitability                                  passes test for appearance of solution

≥99.6%, FCC
外观Appearance                                         White powder
红外光谱Infrared spectrum                        Conforms to Structure
灼烧残渣Residue on ignition (Ash)              ≤0.002 %
纯度Purity (Titr. by NAOH)                         99.60 - 101.00 %
熔点Melting Point                                       151.5 -154.0 °C
水分Water (by Karl Fischer)                       ≤0.20 %
砷Arsenic (As)                                           ≤3 ppm
镉Cadmium (Cd)                                       ≤1 ppm
汞Mercury (Hg)                                         ≤1 ppm
铅Lead (Pb)                                              ≤2 ppm

品级Grade                                     超纯级，≥99.5% (HPLC)  
                                                 (Ultra pure,≥99.5% (HPLC))
外观Appearance                               White Powder or Crystalline Powder
红外光谱Infrared spectrometry         Conforms to Structure
纯度Purity(HPLC)                             ≥99.5% (HPLC)  
灼烧残渣ign. residue(as SO4)           ≤0.05%
干燥失重loss on drying,110 °C        ≤1%  
氯chloride (Cl-):                               ≤50 ppm  
硝酸盐nitrate (NO3-):                      ≤30 ppm  
硫酸盐sulfate (SO42-):                    ≤500 ppm  
砷As:                                              ≤3 ppm  
铜Cu:                                             ≤10 ppm  
铁Fe:                                              ≤5 ppm  
铅Pb:                                             ≤10 ppm  
锌Zn:                                             ≤10 ppm