API
IMPURITY
CHEMICAL NAME
STRUCTURE
2
Fentanyl Citrate

EP Impurity B

N-phenyl-N-(piperidin-4-yl)propanamide Fentanyl-Citrate-EP-Impurity-B
Fentanyl Citrate

EP Impurity E

benzaldehyde Fentanyl-Citrate-EP-Impurity-E