Impurity Standards

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Fexofenadine EP Impurity B

Product Code:
DH/FFN/1002
Molecular Formula:
C32H39NO4
CAS Number:
NA
Molecular Weight:
501.66
Synonyms: 2-[3-[(1RS)-1-hydroxy-4-[4-hydroxydiphenylmethyl)piperidin-1-yl]butyl]phenyl]-2-methylpropanoic acid


Fexofenadine EP Impurity C

Product Code:
DH/FFN/1003
Molecular Formula:
C31H39NO2
CAS Number:
185066-37-9
Molecular Weight:
457.65
Synonyms: 4-(Hydroxydiphenylmethyl)-α-[4-(1-methylethyl)phenyl]-1-piperidinebutanol; DecarboxyFexofenadine


Fexofenadine EP Impurity D

Product Code:
DH/FFN/1004
Molecular Formula:
C33H41NO4
CAS Number:
154825-96-4
Molecular Weight:
515.68
Synonyms: Methyl 2-[4-[(1RS)-1-hydroxy-4-[4-(hydroxydiphenylmethyl) piperidin-1-yl]butyl]phenyl]-2-methylpropanoate. Fexofenadine Methyl Ester


Fexofenadine EP Impurity E

Product Code:
DH/FFN/1005
Molecular Formula:
C18H21NO
CAS Number:
115-46-8
Molecular Weight:
267.37
Synonyms: Diphenyl(piperidin-4-yl)methanol


Fexofenadine EP Impurity F

Product Code:
DH/FFN/1006
Molecular Formula:
C31H37NO4
CAS Number:
185066-33-5
Molecular Weight:
487.63
Synonyms: 2-[4-[1-Hydroxy-4-[4-(hydroxydiphenylmethyl)piperidin-1-yl]butyl]phenyl]propanoic acid


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