Category:
Active Pharmaceutical Ingredients
CAS NO:
N/A
Standard:
EP,
Captopril Impurity E (EP) is a critical reference standard for pharmaceutical quality control, defined as N-[(2S)-1-ethoxy-1-oxopropan-2-yl]-L-proline. Synthesized via esterification of L-proline derivatives, it serves to identify degradation pathways in the active pharmaceutical ingredient. Molecular formula: C9H15NO4; CAS No.: 67308-55-6.
Store at -20°C under inert atmosphere to prevent hydrolysis. Handle with PPE in well-ventilated areas; avoid direct skin contact. Not for clinical use; strictly for laboratory analytical purposes only.