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 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 |