项目Item 分析纯
(AR)
纯度Purity ≥99.0% (GC)
比重Specific gravity (20/20°C) 0.9385-0.9420
沸程Boiling range,℃ 165-167(95%)
游离酸(以CH3COOH计)Free acid,% ≤0.001
折光率Refractive index n20/D 1.437-1.439
灼烧残渣Ignition residue,% ≤0.005
水份Water,% ≤0.05
混合度Miscibility 合格
项目 优级纯
(GR)
外观Appearance 清澈、无悬浮物
纯度Purity ≥99.9% (GC)
色度Color scale,Hazen单位 ≤10(铂-钴色号)
水water ≤250 ppm
铁Iron(Fe) ≤0.050ppm
酸度Acidity(乙酸计) ≤100.0ppm
碱度alkalinity(二甲胺计) ≤5.0ppm
电导率conductivity(25℃) ≤0.50 us/cm
项目 化学纯
(CP)
纯度Purity ≥98.0% (GC)
沸程Boiling range,℃ 164.0~167.0
比重Specific gravity (20/20°C) 0.938~0.942
折光率Refractive index n20/D 1.437~1.439
酸度Acidity(以H+计)/(mmol/100g) ≤0.002
水分water ≤0.10%
项目 色谱纯
(HPLC)
纯度Purity ≥99.8% (GC)
紫外吸光度UV Absorbance:
最大吸收波长Wavelength (nm) Max. Absorbance
268 1.000
275 0.300
300 0.080
350 0.005
400 0.005
溶剂洗脱杂质GC Impurities Eluting Before Solvent <0.5 mg/L
水分Water <0.03%
(色谱纯用于HPLC, GC和光谱级,氮气封装。)
品级Grade 光谱级
(spectrophotometric grade)
外观Appearance 白色至米黄色粉末
红外光谱鉴别Infrared spectrometry Conforms
纯度Purity ≥99.8% (GC)
λ H2O reference
UV Absorbance 400nm ≤0.01
UV Absorbance 360nm ≤0.01
UV Absorbance 320nm ≤0.03
UV Absorbance 310nm ≤0.05
UV Absorbance 290nm ≤0.15
UV Absorbance 280nm ≤0.30
UV Absorbance 270nm ≤1.0
水分Water (by Karl Fischer) ≤0.05 %
蒸发残渣Residue on Evaporation ≤0.001 %
品级Grade 多肽合成级
(grade for peptide synthesis)
外观Appearance 透明液体
红外光谱鉴别Infrared spectrometry Conforms
纯度Purity ≥99.8% (GC)
水分water ≤0.02%
胺测试实验suitability in amine test pass test
品级Grade 紫外光谱级
(grade for UV-spectroscopy )
纯度Purity ≥99.8% (GC)
λ 1 cm path, H2O reference
UV absorption
λ: 280 nm ≤0.3
λ: 290 nm ≤0.15
λ: 310 nm ≤0.05
λ: 320 nm ≤0.03
λ: 360 nm ≤0.005
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