 | C4X-189411 | 5856-63-3 | Impurity | |
| Ethambutol Impurity 11 |
 | C4X-189412 | 10054-05-4 | Impurity | |
| Ethambutol EP Impurity C |
 | C4X-189413 | 134566-79-3 | Impurity | |
| Ethambutol EP Impurity C DiHCl |
 | C4X-18942 | 32454-69-6 | Impurity | |
| "Ethambutol EP Impurity B (2R,2'S-Ethambutol) DiHCl" |
| C4X-18943 | 10054-05-4 | Impurity | |
| "Ethambutol EP Impurity C (2R,2'R-Ethambutol)" |
| C4X-18944 | 52399-93-6 | Impurity | |
| Ethambutol Hydrochloride EP Impurity D |
 | C4X-18946 | 10054-06-5 | Impurity | |
| Ethambutol EP Impurity B |
| C4X-18947 | 498-17-9 | Impurity | |
| Ethambutol Impurity 7(Mixture of Diastereomers) |
| C4X-18948 | 65229-18-7 | Impurity | |
| Ethambutol Impurity 8 |
| C4X-18949 | N/A | Impurity | |
| Ethambutol Impurity 9 |
