Impurity Standards

Search Products:


Search by Project Name:




Entacapone EP Impurity H

Product Code:
DH/ENT/1008
Molecular Formula:
C15H15N3O5
CAS Number:
1150310-15-8
Molecular Weight:
317.3
Synonyms: (2E)-3-(3,4-Dihydroxy-5-nitrophenyl)-2-(piperidin-1-ylcarbonyl)prop-2-ennitrile


Entacapone EP Impurity I

Product Code:
DH/ENT/1009
Molecular Formula:
C13H12N2O6
CAS Number:
1364322-42-8
Molecular Weight:
292.24
Synonyms: Propyl (2E)-2-Cyano-3-(3,4-dihydroxy-5-nitrophenyl)prop-2-enoate


Erythromycin EP Impurity A

Product Code:
DH/ERM/1001
Molecular Formula:
C37H67NO14
CAS Number:
82230-93-1
Molecular Weight:
749.94
Synonyms: (3R,4S,5S,6R,7R,9R,11R,12R,13S,14R)-4-[(2,6-Dideoxy-3C-methyl-3-O-methyl-α-L-ribo-hexopyranosyl)oxy]-14-ethyl-7,12,13-trihydroxy-3-(hydroxymethyl)-5,7,9,11,13-pentamethyl-6-[[3,4,6-trideoxy-3-(dimethylamino)-β-D-xylo-hexopyranosyl]oxy] oxacyclotetradecane-2,10-dione ;Erythromycin F ; Erythromycin A 2-Hydroxymethyl Analog


Erythromycin EP Impurity B

Product Code:
DH/ERM/1002
Molecular Formula:
C36H65NO13
CAS Number:
992-62-1
Molecular Weight:
719.9
Synonyms: (3R,4S,5S,6R,7R,9R,11R,12R,13S,14R)-4-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-α-L-ribo-hexopyranosyl)oxy]-14-ethyl-7,12,13-trihydroxy-3,5,7,9,11,13-hexamethyl-6-[[3,4,6-trideoxy-3-(methylamino)-β-D-xylohexopyranosyl]oxy]oxacyclotetradecane-2,10-dione ;3″-N-Desmethylerythromycin A ; Erythromycin USP RC N ; Clarithromycin EP Impurity R


Erythromycin EP Impurity C

Product Code:
DH/ERM/1003
Molecular Formula:
C37H65NO14
CAS Number:
41451-91-6
Molecular Weight:
747.91
Synonyms: (2S,4aR,4′R,5′S,6′S,7R,8S,9R,10R,12R,14R,15R,16S)-7-Ethyl-5′,8,9,14-tetrahydroxy-4′-methoxy-4′,6′,8,10,12,14,16-heptamethyl-15-[[3,4,6-trideoxy-3-(dimethylamino)-β-D-xylo-hexopyranosyl]oxy]hexadecahydrospiro[5H,11H-1,3-dioxino[5,4c]oxacyclotetradecin-2,2′-pyrane]-5,11-dione ;Erythromycin E


Need more Information about our Products ?