 | C4X-14191 | 1391062-35-3 | Impurity | |
| Sulfasalazine Impurity 1 |
 | C4X-141910 | 1391062-49-9 | Impurity | |
| Sulfasalazine EP Impurity B |
 | C4X-141911 | 1391062-34-2 (free acid) | Impurity | |
| Sulfasalazine EP Impurity E Trisodium Salt |
| C4X-141912 | 1391062-37-5 (free base) | Impurity | |
| Sulfasalazine EP Impurity G Disodium Salt |
| C4X-141913 | NA | Impurity | |
| Sulfasalazine impurity 13 |
| C4X-141914 | 42753-55-9 | Impurity | |
| Sulfasalazine impurity 14 |
| C4X-141915 | N/A | Impurity | |
| Sulfasalazine impurity 15 |
| C4X-14192 | 1391062-49-9?free base? | Impurity | |
| Sulfasalazine EP Impurity B |
 | C4X-14193 | 66030-25-9 | Impurity | |
| Sulfasalazine EP Impurity C |
 | C4X-14194 | 66364-70-3 | Impurity | |
| Sulfasalazine EP Impurity D |
