| NO. | Name | CAS No. |
| 21 | Maleic acid(e-grade) | 110-16-7 |
| 22 | Oxalic acid(e-grade) | 144-62-7 |
| 23 | Adipic acid(e-grade) | 124-04-9 |
| 24 | Diethylenetriaminepentaacetic acid(e-grade) | 67-43-6 |
| 25 | Iminodiacetic acid(e-grade) | 142-73-4 |
| 26 | DL-tartaric acid(e-grade) | 133-37-9 |
| 27 | 1H-benzotriazole(e-grade) | 95-14-7 |
