 | C4X-14175 | 15540-79-1 | Impurity | |
| Sodium aminosalicylate Impurity 5 |
 | C4X-14177 | 23287-26-5 | Impurity | |
| Sodium aminosalicylate Impurity 7 |
 | C4X-14178 | 22717-57-3 | Impurity | |
| Sodium aminosalicylate Impurity 8 |
| C4X-14179 | 33528-09-5 | Impurity | |
| Sodium aminosalicylate Impurity 9 |
 | C4X-14181 | 92-84-2 | Impurity | |
| Promethazine EP Impurity A |
 | C4X-141811 | 108-16-7 | Impurity | |
| Promethazine Impurity 11 |
| C4X-141812 | 4584-49-0 | Impurity | |
| Promethazine Impurity 12 |
 | C4X-141814 | 1135334-50-7 | Impurity | |
| Promethazine Sulfoxide N-Oxide HCl |
 | C4X-141815 | 303-14-0 | Impurity | |
| Promethazine EP Impurity B |
| C4X-141816 | N/A | Impurity | |
| Promethazine Impurity 16 |
