| Parent Drug Name | Name of Impurity | Catalogue No. | |
|---|---|---|---|
| Metamizole | Metamizole EP Impurity B | VL105002 | View CAS 83-07-8 |
| Metamizole | Metamizole EP Impurity C | VL105001 | View CAS 519-98-2 |
| Metamizole | Metamizole EP Impurity C (HCl Salt) | VE006664 | View CAS 856307-27-2 |
| Metamizole / Antipyrine | Metamizole EP Impurity C-D3 HCl | DVE00158 | View |
| Metamizole | Metamizole EP Impurity D | VE006872 | View CAS 58-15-1 |
| Metamizole | Metamizole EP Impurity E | VE006135 | View CAS 117-38-4 |
| Metamizole | Metamizole EP impurity A | VL105003 | View CAS 1672-58-8 |
