99%:外观Appearance 白色薄片或结晶 红外光谱鉴别Infrared spectrometry 和对照匹配 纯度Purity ≥99.0% (GC) 熔点Melting point 85°C - 90°C 水分water ≤0.2%(K.F) 99.5%(用于缓冲溶液):
外观Appearance 白色至类白色粉末 红外光谱鉴别Infrared spectrometry Conforms 纯度Purity ≥99.5% (GC) 熔点Melting point 86°C - 92°C 灼烧残渣ign. residue (900 °C) ≤0.1% pH 9.5-11.0 (25 °C, 50 mg/mL in H2O) pKa (25 °C) 6.95 氯chloride (Cl-): ≤50 ppm 硫酸根sulfate (SO42-): ≤50 ppm Ca: ≤10 ppm Cd: ≤5 ppm Co: ≤5 ppm Cr: ≤5 ppm Cu: ≤5 ppm Fe: ≤5 ppm K: ≤50 ppm Mg: ≤5 ppm Mn: ≤5 ppm Na: ≤50 ppm Ni: ≤5 ppm Pb: ≤5 ppm Zn: ≤5 ppm 品级Grade 荧光分析级 (for Fluorimetric Analysis) 外观Appearance 白色至类白色粉末 红外光谱鉴别Infrared spectrometry Conforms 纯度Purity ≥99.5% (GC) 熔点Melting point 86°C - 92°C 不溶物insoluble matter, passes filter test 水分water ≤0.2%(K.F) 灼烧残渣ign. residue (900 °C) ≤0.05% 荧光fluorescence λex 200-600 nm; λem 300-800 nm (corresponds) pH 9.5-11.0 (25 °C, 0.1 M in H2O) pKa (25 °C) 6.95 氯chloride (Cl-): ≤50 ppm 硫酸根sulfate (SO42-): ≤50 ppm Al: ≤10 ppm As: ≤0.1 ppm Ba: ≤5 ppm Bi: ≤5 ppm Ca: ≤50 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 Na: ≤50 ppm Ni: ≤5 ppm Pb: ≤5 ppm Sr: ≤5 ppm Zn: ≤5 ppm λ 0.1 M in H2O 紫外吸收UV absorption λ: 260 nm Amax: 0.10 λ: 280 nm Amax: 0.10
品级Grade 分子生物学级 (for molecular biology) DNA酶DNases, none detected RNA酶RNases, none detected 磷酸酶phosphatases, none detected 蛋白酶proteases, none detected 外观Appearance 白色至类白色粉末 红外光谱鉴别Infrared spectrometry Conforms 纯度Purity ≥99.5% (GC) 熔点Melting point 86°C - 92°C 不溶物insoluble matter, passes filter test 水分water ≤0.2%(K.F) 灼烧残渣ign. residue (900 °C) ≤0.05% 荧光fluorescence λex 200-600 nm; λem 300-800 nm (corresponds) pH 9.5-11.0 (25 °C, 0.1 M in H2O) pKa (25 °C) 6.95 氯chloride (Cl-): ≤50 ppm 硫酸根sulfate (SO42-): ≤50 ppm Al: ≤10 ppm As: ≤0.1 ppm Ba: ≤5 ppm Bi: ≤5 ppm Ca: ≤50 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 Na: ≤50 ppm Ni: ≤5 ppm Pb: ≤5 ppm Sr: ≤5 ppm Zn: ≤5 ppm λ 0.1 M in H2O 紫外吸收UV absorption λ: 260 nm Amax: 0.10 λ: 280 nm Amax: 0.10
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