外观Appearance 白色粉末
红外光谱鉴定Infrared spectrometry 和对照品匹配
熔点Melting point 40°C - 43°C
纯度Purity >99.0% (碘量法)
紫外吸收UV (1 M soln. in water)
500 nm A: <0.035
干燥失重Loss on Drying(%) ≤0.5
氧化DTT Oxidized DTT(%) ≤0.5
水溶性实验Solubility in water 5%
透光度Transmittance >99 % (c=5, 660 nm, 水) 1 cm cell

品级Grade 分子生物学级
(for molecular biology, ≥99%)
外观Appearance 白色粉末
含量assay ≥99.0% (RT)
pH 4.0-6.5 (25 °C, 0.1 M in H2O)
熔点Melting point 41°C - 44°C
水溶性solubility H2O: soluble0.1 M at 20 °C, clear, colorless
sulfate (SO42-): ≤50 ppm
Heavy metals(as lead) <5ppm
DNase, RNase, protease, none detected
λ 0.1 M in H2O
UV absorption
λ: 260 nm A: ≤0.400
λ: 280 nm A: ≤0.100

品级Grade 电泳级
(for electrophoresis, ≥99%)
外观Appearance 白色粉末
含量assay ≥99.0% (RT)
pH 4.0-6.5 (25 °C, 0.1 M in H2O)
熔点Melting point 41°C - 44°C
水溶性solubility H2O: 50mg/ml, clear, colorless
sulfate (SO42-): ≤50 ppm
Heavy metals(as lead) <10ppm
UV absorbance A280nm <0.04 (0.02M SOLUTION)
Test for use in reduced SDS-PAGE Pass