99%：


外观Appearance                          White Powder or crystal
红外光谱Infrared spectrometry           Conforms to Structure
熔点Melting point                       263°C - 264°C
纯度Purity                              99.0 - 101.0 % (以干基计)
干燥损失Loss on drying                  
<0.3 % (105°C, 3 小时) >重金属Heavy metals (as Pb)              
<10 ppm >硫酸盐灰分Sulfated ash                  
<0.1 % >比旋度Specific rotation [a]20/D         +20.5° - +21.5° (c=8, 6 N HCl)
痕量分析Trace analysis :
   硫酸根SO4                            < 200 PPM
   氨基NH4                              < 200 PPM
   砷As                                 < 1 PPM
   铁Fe                                 < 30 PPM
透光度Transmittance                     >95 % (c=10, H2O, 430 nm) 1 cm cell
其它氨基酸Foreign amino acids          
<0.5 % (TLC, 50 ug 点样) >

Ultra pure,≥99.5% (AT):


外观Appearance                          White Powder or crystal
红外光谱Infrared spectrometry           Conforms to Structure
纯度Purity                              ≥99.5% (AT)
比旋光度Specific rotation [α]20/D       +20.5±0.5°, c = 5% in 5 M HCl
不溶物insoluble matter,                 passes filter test
外源氨基酸foreign amino acids           ≤0.3%
灼烧残渣Residue on ignition             ≤0.1% (as SO4)
干燥损失loss on drying, 20 °C (HV)     ≤0.5%
pH                                      5.0-6.0 (25 °C, 0.5 M in H2O)
水溶性solubility H2O:                   soluble0.5 M at 20 °C, clear, colorless
硫酸根sulfate (SO42-):                  ≤100 ppm
Al:                                     ≤5 ppm
  As:                                   ≤0.1 ppm
  Ba:                                   ≤5 ppm
  Bi:                                   ≤5 ppm
  Ca:                                   ≤10 ppm
  Cd:                                   ≤5 ppm
  Co:                                   ≤5 ppm
  Cr:                                   ≤5 ppm
  Cu:                                   ≤5 ppm
  Fe:                                   ≤5 ppm
  K:                                   ≤50 ppm
  Li:                                   ≤5 ppm
  Mg:                                   ≤5 ppm
  Mn:                                   ≤5 ppm
  Mo:                                   ≤5 ppm
  NH4+:                                 ≤100 ppm
  Na:                                   ≤50 ppm
  Ni:                                   ≤5 ppm
  Pb:                                   ≤5 ppm
  Sr:                                   ≤5 ppm
  Zn:                                   ≤5 ppm
λ                                  0.5 M in H2O
UV absorption λ: 260 nm A:              ≤0.1
  λ: 280 nm A:                          ≤0.1



品级Grade             非动物源，EP, JP, USP ；用于细胞培养，98.5 to 101.0%  
        (from non-animal source, EP, JP, USP, for cell culture, 98.5 to 101.0%)
来源origin                            non-animal source
外观appearance                        white crystalline powder
红外鉴别试验identification by ir      compares to reference standard
水溶解性solubility                    clear colorless solution at 1.0g to 10ml of water
比旋光度specific rotation              +20.8 to +21.5 deg (20degc/EP)
                                       +20.4 to +21.4 deg (25degc/USP)
   c = 8 in 6m hydrochloric acid
氯chloride                             19.12 to 19.51%
铵ammonium                             ≤ 0.02%
硫酸盐sulfate                          ≤ 0.020%
铁iron                                 ≤ 10 ppm
重金属heavy metals                     ≤ 10 ppm
砷arsenic                              ≤ 1 ppm
干燥失重loss on drying                 ≤ 0.10%
灼烧残渣residue on ignition            ≤ 0.10%
残留溶剂residual solvents              meets the requirements
茚三酮阳性物质ninhydrin-positive substances (other amino acids)
                                       conforms
ph test                                5.0 to 6.0 (10% in water)
含量assay (dry basis)                  98.5 to 100.5%
内毒素endotoxin assay                  ≤ 1 eu/mg
细胞培养测试cell culture test          pass