 | C4X-185058 | N/A | Impurity | |
| Atracurium EP Impurity I |
| C4X-185059 | 96946-44-0 (Absolute) | Impurity | |
| Cisatracurium EP Impurity H |
 | C4X-185061 | 1075727-06-8 | Impurity | |
| Atracurium Besilate EP Impurity E |
| C4X-185062 | 1100676-15-0(free base) | Impurity | |
| Atracurium Besilate Impurity 62 |
 | C4X-185066 | 91950-41-3 | Impurity | |
| Atracurium Impurity 66 |
| C4X-185068 | N/A | Impurity | |
| Atracurium Impurity 68 |
 | C4X-185069 | 2688-77-9 | Impurity | |
| (S)-Laudanosine |
| C4X-18507 | N/A | Impurity | |
| Atracurium Impurity 7 |
| C4X-185070 | N/A | Impurity | |
| Cisatracurium EP Impurity U |
| C4X-185071 | N/A | Impurity | |
| Atracurium Impurity 71 |
