项目 分析纯
(AR)
不饱和化合物unsaturated禁发网址pounds ≤0.75%
沸程boiling range 96.0~98.0℃
含量Assay ≥99.0%
相对密度Specific gravity (20/20°C) 0.803~0.805
醛aldehydes ≤0.2%
酸度Acidity(以H+计)/(mmol/100g) ≤0.05
折光率Refractive index n20/D 1.3845~1.3855
蒸发残渣Evaporation residue ≤0.002%
酯ester ≤0.1%
项目 化学纯
(CP)
不饱和化合物unsaturated禁发网址pounds ≤0.1%
沸程boiling range 96.0~98.0℃
含量Assay ≥98.5%
相对密度Specific gravity (20/20°C) 0.803~0.805
醛aldehydes ≤0.2%
酸度Acidity(以H+计)/(mmol/100g) ≤0.1
折光率Refractive index n20/D 1.384~1.386
蒸发残渣Evaporation residue ≤0.003%
酯ester ≤0.1%
项目 色谱纯
(HPLC)
外观Appearance 无色透明液体
纯度Purity >99.8% (GC)
非挥发性物质Non-volatile matter
<0.0003 % >游离酸Free acid (C3H6O2)
<0.001 % >水份Water
<0.05 % >紫外吸光值UV (1 cm cell vs HPLC级水) :
210 nm A:
<0.70 > 220 nm A:
<0.3 > 250 nm A:
<0.05 >
ACS级
项目名称Item ACS Grade
含量Assay ≥99.5%
溶解性试验Solubility in water Passes
色度,黑曾单位Color(APHA) 10
蒸发残渣Residue after evaporation ≤0.001%
可滴定酸Titrable acid ≤0.0004meq/g
羰基化合物(以C2H5OH计)Carbonly禁发网址pounds ≤0.03%
乙醇Ethyl alcohol ≤0.01%
甲醇Methanol ≤0.01%
异丙醇Isooropyl alchol ≤0.05%
水Water ≤0.2%
|