| 英文名 | Benzoic acid |
|---|---|
| 类型 | 芳香族化合物 |
| CAS号 | 65-85-0 |
| 物理性质 | M 122.1, m 122.6-123.1℃, pK25 4.12. |
| 提纯方法 | For use as a volumetric standard, analytical reagent grade benzoic acid should be carefully fused to ca 130℃(to dry it) in a platinum crucible, and then powdered in an agate mortar. Benzoic acid has been crystallised from boiling water (charcoal), aqueous acetic acid, glacial acetic acid, *C6H6, aqueous EtOH, pet ether (b 60-80℃), and from EtOH solution by adding water. It is readily purified by fractional crystallisation from its melt and by sublimation in a vacuum at 80℃. The S-benzylisothiuronium salt has m 167℃(from EtOH/H2O). [Beilstein 9 IV 273.] |
| 相关文献 | 暂无权限 |
扩展信息
