99%:
外观Appearance 无色低熔点固体
含量assay ,% >99.00
总杂质total impurities(以P计),% ≤0.005
不溶性杂质Insoluble matter,% ≤0.1
灼烧残渣ign. residue,% ≤0.1
折射率refractive index n20/D 1.4455
pH range 9.0-10.5
等电点pKa (25℃) 9.7
水溶性solubility H2O: 20℃时0.5 M , 无色清澈
水份Water,% <0.8
90%:
外观Appearance 无色低熔点固体
纯度Purity ≥90.0% (GC)
纯度Purity ≥90.0% (中和滴定)
凝固点Freezing point 20.0 - 25.0 ℃
useful pH range 9.0 - 10.5
pKa (25 °C) 9.7
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