 | C4X-183554 | 880-09-1 | Impurity | |
| Hydroxychloroquine Impurity 54 |
 | C4X-183556 | 765-38-8 | Impurity | |
| Hydroxychloroquine Impurity 56 |
 | C4X-18356 | 6281-58-9 | Impurity | |
| Hydroxychloroquine EP Impurity F |
| C4X-183568 | 23443-05-2 | Impurity | |
| Hydroxychloroquine Impurity 68 |
| C4X-183569 | 860544-46-3 (free base) | Impurity | |
| Hydroxychloroquine Impurity 69 DiHCl |
 | C4X-18357 | 47493-14-1 | Impurity | |
| Hydroxychloroquine Impurity 7 |
| C4X-183571 | 2411340-31-1 (free base) | Impurity | |
| Hydroxychloroquine Impurity 71 Sulfate |
| C4X-183572 | 2411340-32-2 (free base) | Impurity | |
| Hydroxychloroquine Impurity 72 Sulfate |
| C4X-183574 | 2411340-32-2 | Impurity | |
| Hydroxychloroquine Impurity 74 |
 | C4X-18358 | 86-98-6 | Impurity | |
| Hydroxychloroquine EP Impurity G |
