| Fosfomycin Process Impurity 1 | 108549-23-1 | Ax-IMP1451 |
| Fosfomycin Process Impurity 2 | 364631-72-1 | Ax-IMP1452 |
| Fosfomycin Process Impurity 3 | 1404217-43-1 | Ax-IMP1453 |
| Fosfomycin Tromethamine WS | 78964-85-9 | Ax-IMP1454 |
| Fosfomycin EP Impurity C | 114252-50-5; 23001-39-0 (free Base) | Ax-IMP1450 |
| Fosfomycin EP Impurity A | 132125-60-1 (acid); 1160525-87-0 (salt) | Ax-IMP1449 |
| Acetaminophen impurity B | 1693-37-4 | Ax-IMP1448 |
| Levofloxacin Process Impurity 1 | 157766-27-3 | Ax-IMP1444 |
| Levofloxacin Process Impurity 2 | 601490-35-1 | Ax-IMP1445 |
| Levofloxacin Process Impurity 3 | 431058-46-7 | Ax-IMP1446 |