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99%：
外观Appearance 白色结晶粉末或结晶
红外光谱鉴别Infrared spectrometry 和对照品匹配
纯度Purity >98.0%
干燥损失Loss on drying
<0.2 % (105°C, 3 小时) >重金属Heavy metals (as Pb)
<10 ppm >硫酸盐灰分Sulfated ash
<0.1 % >pH 4.7 - 6.2 (2.5% 溶液， 25°C)
其它氨基酸Other amino acids
<0.5 % (TLC) >比旋度Specific rotation [a]20/D +21.4° - +23.6°(c=8, 6 N HCl)
痕量分析Trace analysis :
SO4 < 300 ppm
NH4 < 200 ppm
Fe < 10 ppm
透光度Transmittance >95 % (c=10, H2O, 430 nm) 1 cm cell
品级Grade 药典级，非合成，用于细胞培养
(EP, JP, USP，not synthetic for cell culture)
来源origin non-animal source
appearance white crystalline powder
identification by ir conforms to structure
solubility clear colorless solution at 1.0g to 10ml of water
Specific rotation [a]20/D +22.1 to +22.9 °
* c = 8 in 6m hydrochloric acid
chloride 16.58 to 17.00%
ammonium ≤ 0.02%
sulfate ≤0.020%
iron ≤ 10 ppm
heavy metals ≤ 10 ppm
arsenic ≤ 1 ppm
loss on drying ≤ 0.20%
residue on ignition ≤ 0.10%
residual solvents meets the requirements
ninhydrin-positive substances (other amino acids) conforms
ph test 4.7 to 6.2 (1.0g in 10ml water)
assay (dry basis) 98.5 to 101.0%
endotoxin assay ≤ 1 eu/mg
cell culture test pass
note meets usp, ep and jp testing specifica tions
品级Grade 超纯级
(Ultra pure >99% (HPLC))
外观Appearance 白色粉末
红外光谱鉴别Infrared spectrometry Conforms to Structure
纯度Purity ≥99% (HPLC)
磷酸Phosphorus (P) <0.0005%
不溶物Insoluble matter <0.1%
灼烧残渣residue on ignition
<0.1% >pH 5.0-7.0 (20 °C, 1 M in H2O)
水溶性solubility H2O: soluble1 M at 20 °C, clear, colorless
硫酸根sulfate (SO42-):
<0.05% > Al:
<0.0005% > Ca:
<0.0005% > Cu:
<0.0005% > Fe:
<0.0005% > K:
<0.005% > Mg:
<0.0005% > NH4+:
<0.05% > Na:
<0.005% > Pb:
<0.001% > Zn:
<0.0005% >UV absorption
A260 (1 m in water)
<0.2 >A280 (1 m in water) <0.1
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