| Etoricoxib Impurity | 40061-50-5 | Ax-IMP503 |
| Lidocaine Impurity A | 87-62-7 | Ax-IMP504 |
| Lidocaine Impurity B | 2903-45-9 | Ax-IMP505 |
| Lidocaine Impurity C | 2198-53-0 | Ax-IMP506 |
| Lidocaine Impurity D | 7729-94-4 (HCl) ; 7728-40-7 (base) | Ax-IMP507 |
| Lidocaine Impurity H | 1131-01-7 | Ax-IMP508 |
| Desfluoro Citalopram Hydrobromide | 1026263-04-6 | Ax-IMP526 |
| Desfluoro Citalopram Oxalate | 1093072-86-6 | Ax-IMP525 |
| Zolpidem Acid Impurity | 189005-44-5 | Ax-IMP529 |
| Rabeprazole 2-chloromethyl Impurity | 153259-31-5 | Ax-IMP530 |