Impurity Standards

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Clarithromycin EP Impurity P

Product Code:
DH /CLM/1016
Molecular Formula:
C39H71NO13
CAS Number:
123967-58-8
Molecular Weight:
761.98
Synonyms: (3R,4S,5S,6R,7R,9R,11R,12R,13S,14R)-4-(((2R,4R,5S,6S)-4,5-dimethoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-6-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-14-ethyl-12,13-dihydroxy-7-methoxy-3,5,7,9,11,13-hexamethyloxacyclotetradecane-2,10-dione


Clarithromycin EP Impurity Q

Product Code:
DH /CLM/1017
Molecular Formula:
C38H69NO14
CAS Number:
118074-07-0
Molecular Weight:
763.95
Synonyms: Clarithromycin N-Oxide ; 6-O-Methyl Erythromycin N-Oxide


Clarithromycin EP Impurity R

Product Code:
DH /CLM/1018
Molecular Formula:
C36H65NO13
CAS Number:
992-62-1
Molecular Weight:
719.9
Synonyms: N-Desmethyl 6-O-Desmethyl Clarithromycin ; N-Desmethyl Erythromycin A


Clonidine EP Impurity A

Product Code:
DH /CLD/1001
Molecular Formula:
C5H8N2O2
CAS Number:
5391-39-9
Molecular Weight:
128.13
Synonyms: 1-Acetylimidazolidin-2-one


Clonidine EP Impurity B

Product Code:
DH /CLD/1002
Molecular Formula:
C11H11Cl2N3O
CAS Number:
54707-71-0
Molecular Weight:
272.13
Synonyms: 1-Acetyl-2-[(2,6-dichlorophenyl)amino]-4,5-dihydro-1Himidazole


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