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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