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项目Item 分析纯
(AR)
含量Assay,% ≥ 98
相对密度Specific gravity (20/20°C) 0.930~0.935
不挥发物Novolative,% ≤ 0.002
酸度Acidity,% ≤ 0.005
沸程Boiling range,℃ 55.5~58.0
项目 化学纯
(CP)
含量Assay ≥97.5%
相对密度Specific gravity (20/20°C) 0.925~0.935
酸度Acidity(以H+计)/(mmol/100g) ≤0.16
蒸发残渣Ignition residue ≤0.004%
品级Grade 色谱纯
grade for HPLC
纯度Purity ≥99.8% (GC)
水分water ≤0.05%
蒸发残渣Evaporation residue ≤0.001%
溶剂浓度solvent strength ε (Al2O3) 0.60
λ 1 cm cell, H2O 对照
紫外吸收UV absorption
255 nm A: 1.0
275 nm A: 0.1
300 nm A: 0.01
品级Grade 无水级
(anhydrous, 99.5%)
外观Appearance 无色液体
红外光谱鉴别Infrared spectrometry 和对照匹配
纯度Purity ≥99.5% (GC)
水分Water (by Karl Fischer) ≤0.003 %
蒸发残渣Residue on Evaporation ≤0.0003 %
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