Azithromycin

Azithromycin Related Products

Venkatasai is a leading innovator in the field of pharmaceutical reference standards, offering high-quality Reference Standards of Azithromycin, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope-labeled compounds, and nitrosamines (N-NO products). Our Azithromycin impurity reference standards play a vital role in pharmaceutical research, supporting product development, ANDA and DMF filings, quality control (QC), method validation, and stability studies. They are also instrumental in identifying unknown impurities and evaluating genotoxic potential. All Azithromycin-related products are thoroughly characterized and supplied with comprehensive Certificates of Analysis (COA) and analytical data that comply with regulatory standards. EP/USP traceable standards can also be provided upon request. Furthermore, all supplied products undergo periodic re-testing to ensure continued quality and reliability.

Azaerythromycin A 11,12-hydrogen borate

(3aS,4R,7R,8S,9S,10R,11R,13R,16R,16aR)-10-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-4-ethyl-2,11-dihydroxy-8-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3a,7,9,11,13,16-hexamethyldo
CAT No: VS-A111020
CAS No: 194809-66-0
Mol.F.: C37H69BN2O13
Mol.Wt.: 760.8
Status: Custom Synthesis

Azithromycin

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-13-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-?-L-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-(dimethylamino)-?-D-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-15-
CAT No: VS-A111029
CAS No: 83905-01-5
Mol.F.: C38H72N2O12
Mol.Wt.: 749.02
Status: Custom Synthesis

Azithromycin Dihydrate

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-11-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptameth
CAT No: VS-A111000
CAS No: 117772-70-0
Mol.F.: C38H72N2O12?: 2(H2O)
Mol.Wt.: 749 : 2(18.02)
Status: Custom Synthesis

Azithromycin EP Impurity A

9-Deoxo-9a-aza-9a-homo Erythromycin A
CAT No: VS-A111001
CAS No: 76801-85-9
Mol.F.: C37H70N2O12?
Mol.Wt.: 735.0?
Status: Custom Synthesis

Azithromycin EP Impurity B

(2R,3R,4R,5R,8R,10R,11R,12R,13S,14R)-13-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-a-L-ribo-hexopyranosyl)oxy]-2-ethyl-4,10-dihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-(dimethylamino)-?-D-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-15-one
CAT No: VS-A111002
CAS No: 307974-61-4
Mol.F.: C38H72N2O11?
Mol.Wt.: 733.0?
Status: Custom Synthesis

Azithromycin EP Impurity C

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-13-[(2,6-Dideoxy-3-C-methyl-?-l-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-dimethylamino-?-d-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-15-one
CAT No: VS-A111003
CAS No: 620169-47-3
Mol.F.: C37H70N2O12?
Mol.Wt.: 735.0?
Status: Custom Synthesis

Azithromycin EP Impurity D

14-Demethyl-14-(hydroxymethyl)azithromycin
CAT No: VS-A111004
CAS No: 612069-26-8
Mol.F.: C38H72N2O13?
Mol.Wt.: 765.0?
Status: Custom Synthesis

Azithromycin EP Impurity E

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-11-[(3-Amino-3,4,6-trideoxy-?-D-xylo-hexopyranosyl)oxy]-13-[(2,6-dideoxy-3-C-methyl-3-O-methyl-?-L-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan-15-one
CAT No: VS-A111005
CAS No: 612069-27-9
Mol.F.: C36H68N2O12?
Mol.Wt.: 720.9?
Status: Custom Synthesis

Azithromycin EP Impurity F

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-13-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-?-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-(formylmethylamino)-?-D-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-1
CAT No: VS-A111006
CAS No: 612069-28-0
Mol.F.: C38H70N2O13
Mol.Wt.: 763.0?
Status: Custom Synthesis

Azithromycin EP Impurity G

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-13-[(2,6-Dideoxy-3-C-methyl-3-O-methyl -?-L-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-[methyl[(4-methylphenyl)sulfonyl]amino]-?-D-xylo-hexopyranosyl]oxy]-1-oxa
CAT No: VS-A111007
CAS No: 612069-31-5
Mol.F.: C44H76N2O14S?
Mol.Wt.: 889.1?
Status: Custom Synthesis

Azithromycin EP Impurity H

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-11-[[3-[[[4-(Acetylamino)phenyl]sulfonyl]methylamino]-3,4,6-trideoxy-?-D-xylo-hexopyranosyl]oxy]-13-[(2,6-dideoxy-3-C-methyl-3-O-methyl-a-L-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl
CAT No: VS-A111008
CAS No: 612069-30-4
Mol.F.: C45H77N3O15S?
Mol.Wt.: 932.2?
Status: Custom Synthesis

Azithromycin EP Impurity I

?(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-11-(((2S,3R,4S,6R)-3-hydroxy-6-methyl-4-(methylamino)tetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptamethy
CAT No: VS-A111009
CAS No: 172617-84-4
Mol.F.: C37H70N2O12
Mol.Wt.: 734.98
Status: Custom Synthesis

Azithromycin EP Impurity J

?((2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-Ethyl-3,4,10,13-tetrahydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-dimethylamino-Beta-D-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-15-one)
CAT No: VS-A111010
CAS No: 117693-41-1
Mol.F.: C30H58N2O9?
Mol.Wt.: 590.8
Status: Custom Synthesis

Azithromycin EP Impurity K

C14,1?-Epoxy Azithromycin ;
CAT No: VS-A111011
CAS No: 612534-95-9
Mol.F.: C38H70N2O13?
Mol.Wt.: 763.0?
Status: Custom Synthesis

Azithromycin EP Impurity L

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-13-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-?-L-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-(dimethyloxidoamino)-?-D-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadeca
CAT No: VS-A111012
CAS No: 90503-06-3
Mol.F.: C38H72N2O13?
Mol.Wt.: 765.0?
Status: Custom Synthesis

Azithromycin EP Impurity M

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-13-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-?-L-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-(formylamino)-?-D-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-15-on
CAT No: VS-A111013
CAS No: 765927-71-7
Mol.F.: C37H68N2O13
Mol.Wt.: 748.9
Status: Custom Synthesis

Azithromycin EP Impurity N

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-11-[[4,6-dideoxy-?-D-erythro-hexopyranos-3-ulos-1-yl]oxy]-13-[(2,6-dideoxy-3-C-methyl-3-O-methyl-?-L-ribo-hexopyranosyl)oxy]-2-ethyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan-15-one
CAT No: VS-A111014
CAS No: 612069-25-7
Mol.F.: C36H65NO13?
Mol.Wt.: 719.9?
Status: Custom Synthesis

Azithromycin EP Impurity O

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-13-[(2,6-Dideoxy-3-C-methyl-3-O-methyl-?-l-ribo-hexopyranosyl)oxy]-2-propyl-3,4,10-trihydroxy-3,5,6,8,10,12,14-heptamethyl-11-[[3,4,6-trideoxy-3-(dimethylamino)-?-d-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-15
CAT No: VS-A111015
CAS No: 763924-54-5
Mol.F.: C39H74N2O12?
Mol.Wt.: 763.0?
Status: Custom Synthesis

Azithromycin EP Impurity P

11-((4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-2,6-diethyl-3,4,10-trihydroxy-13-((5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,8,10,12,14-hexamethyl-1-oxa-6-azacyclopentadecan-15-one
CAT No: VS-A111016
CAS No: 92594-45-1
Mol.F.: C39H74N2O12
Mol.Wt.: 763
Status: Custom Synthesis

Azithromycin EP Impurity Q

N-(4-(N-((2S,3R,4S,6R)-2-(((2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptamethyl-15-oxo-1-oxa-6-azacyclopentadecan-11-yl)oxy)-3-hydroxy-
CAT No: VS-A111022
CAS No: 2095879-65-3
Mol.F.: C44H75N3O15S?
Mol.Wt.: 918.1
Status: Custom Synthesis

Azithromycin Impurity 2

methyl ((2S,3R,4S)-2-(((2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptamethyl-15-oxo-1-oxa-6-azacyclopentadecan-11-yl)oxy)-3-hydroxy-6-methy
CAT No: VS-A111023
CAS No: N/A
Mol.F.: C38H70N2O14
Mol.Wt.: 779
Status: Custom Synthesis

Azithromycin Impurity 3 Sodium Salt

sodium (2R,3S,4S,5R,6R,8R)-5-(((2S,3R,4S)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-6-hydroxy-3-(((2R,4R,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-2,4,6,8-tetramethyl-9-(methyl((2R,3R,4R,5R)-3,4,5-trihydroxy
CAT No: VS-A111024
CAS No: N/A
Mol.F.: C38H73N2O13 : Na
Mol.Wt.: 766.01 : 23.0
Status: Custom Synthesis

Azithromycin Impurity 6

(3aS,4R,7R,8S,9S,10R,11R,13R,16R,16aR)-10-(((2S,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-4-ethyl-2,11-dihydroxy-8-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3a,7,9,11,13,15,16-heptamethyld
CAT No: VS-A111025
CAS No: N/A
Mol.F.: C38H71BN2O13
Mol.Wt.: 774.8
Status: Custom Synthesis

Azithromycin Impurity 7

(2R,3S,4R,5R,8R,10R,11R,12R,13S,14R)-2-ethyl-3,4,10,11-tetrahydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan-15-one
CAT No: VS-A111026
CAS No: 1914946-68-1
Mol.F.: C30H57NO10
Mol.Wt.: 591.8
Status: Custom Synthesis

Azithromycin Impurity Q

(3R,4R,5S,6R,9R,10S,11S,12R,13S,15R,Z)-12-(((2S,3S,4S)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-6-ethyl-4,5-dihydroxy-10-(((2R,4R,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,9,11,13,15-hexamethyl-7,16-dio
CAT No: VS-A111017
CAS No: N/A
Mol.F.: C37H66N2O12?
Mol.Wt.: 730.9
Status: Custom Synthesis

Azithromycin Impurity R

(1R,2R,3R,6R,7S,8S,9R,10R,12R,15R)-9-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-3-ethyl-2,10-dihydroxy-7-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-2,6,8,10,12,15-hexamethyl-4,16-di
CAT No: VS-A111018
CAS No: 161193-44-8
Mol.F.: C37H66N2O12?
Mol.Wt.: 730.9
Status: Custom Synthesis

Azithromycin Impurity Zy

3'N-demethyl-3-'-N-buthyl-2-ol-azithromycin
CAT No: VS-A111027
CAS No: N/A
Mol.F.: C41H78N2O13
Mol.Wt.: 807.1
Status: Custom Synthesis

3-Hydroxy Azithromycinoic Acid Sodium Salt

(2R,3S,4S,5R,8R)-5-(((2S,3R,4S,6R)-4-(dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-3,6-dihydroxy-2,4,6,8-tetramethyl-9-(methyl((2R,3R,4R,5R)-3,4,5-trihydroxy-4-methylheptan-2-yl)amino)nonanoic acid, sodium salt
CAT No: VS-A111019
CAS No: N/A
Mol.F.: C30H59N2O10 : Na
Mol.Wt.: 607.81 : 23.0
Status: Custom Synthesis

3 -N-Demethyl-3 -N- (phenylsulfonyl) azithromycin

N-((2S,3R,4S)-2-(((2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptamethyl-15-oxo-1-oxa-6-azacyclopentadecan-11-yl)oxy)-3-hydroxy-6-methyltetr
CAT No: VS-A111021
CAS No: N/A
Mol.F.: C43H74N2O14S?
Mol.Wt.: 875.1
Status: Custom Synthesis

N-Nitroso Azithromycin EP Impurity M

N-((2S,3R,4S,6R)-2-(((2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-ethyl-3,4,10-trihydroxy-13-(((2R,4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,6,8,10,12,14-heptamethyl-15-oxo-1-oxa-6-azacyclopentadecan-11-yl)oxy)-3-hydroxy-6-meth
CAT No: VS-A111028
CAS No: NA
Mol.F.: C37H67N3O14
Mol.Wt.: 778.0
Status: Custom Synthesis

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