| Parent Drug Name | Name of Impurity | Catalogue No. | |
|---|---|---|---|
| Azathioprine | Azathioprine EP Impurity A | VL4730001 | View CAS 4531-54-8 |
| Azathioprine | Azathioprine EP Impurity B | VE008748 | View CAS 157930-13-7 |
| Azathioprine | Azathioprine EP Impurity C | VL4730002 | View CAS 4897-25-0 |
| Azathioprine | Azathioprine EP Impurity D | VL4730006 | View CAS 6339-54-4 |
| Azathioprine | Azathioprine EP Impurity E | VL4730005 | View CAS 73703-74-9 |
| Azathioprine | Azathioprine EP Impurity F | VL4730008 | View CAS 68-94-0 |
| Azathioprine | Azathioprine EP Impurity G | VL4730003 | View CAS 5581-52-2 |
| Azathioprine | Azathioprine Impurity 1 | VE0010939 | View |
