| 色譜級 | HPLC | |
| 純度 | Purity(GC) | ≥99.9% |
| 紅外光譜 | Identity(IR) | Conforms(合格) |
| 蒸發(fā)殘?jiān)?/span> | Residue on evaporating | ≤5.0mg/L |
| 水分 | Water | ≤500ppm |
| 酸度 | Acidity | ≤0.0002meq/g |
| 堿度 | Alkalinity | ≤0.0002meq/g |
| 透過率 | Transmission | |
| -at 220nm | ≥50% | |
| -at 230nm | ≥75% | |
| -at 260nm | ≥90% | |
| -from 280nm | ≥96% | |