| Febuxostat Process Impurity | 161718-81-6 | Ax-IMP1321 |
| 1-(4-phenoxyphenoxy)propan-2-ol | 57650-78-9 | Ax-922 |
| 1-chloro-2-ethoxyethane | 628-34-2 | Ax-920 |
| Dicyano nitro Impurity | 52054-41-8 | Ax-IMP1322 |
| chloromethyl carbonochloridate | 22128-62-7 | Ax-921 |
| Dehydro Desloratadine Impurity | 117811-20-8 | Ax-IMP1323 |
| (E)-1,3,5-trichloro-2-(2-nitroprop-1-en-1-yl)benzene | 1228284-88-5 | Ax-882 |
| Ribofuranose impurity | 76497-54-6 | Ax-IMP1303 |
| Pydiflumetofen | 1228284-64-7 | Ax-881 |
| Tetrahydrofolate Impurity A | 4271-30-1 | Ax-IMP1304 |