Azithromycin-Impurities | Pharmaffiliates

azithromycin and its Impurities

A broad spectrum antibiotic which is used to inhibit some Gram-positive bacteria, some Gram-negative bacteria, and many atypical bacteria. Azithromycin is an azalide which is a type of macrolide antibiotic. It prevents bacteria from growing by interfering in its protein synthesis. Reference standards of Azithromycin API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.

Displaying 54 results for azithromycin Impurities
PA 01 88000

Azithromycin - API

Azithromycin


  • Catalogue No.:PA 01 88000

  • CAS :

    83905-01-5

  • Molecular Formula : C38H72N2O12

  • Molecular Weight : 748.98

PA 01 88010

Azithromycin - Impurity A

6-Demethylazithromycin


  • Catalogue No.:PA 01 88010

  • CAS :

    76801-85-9

  • Molecular Formula : C37H70N2O12

  • Molecular Weight : 734.96

PA 01 88020

Azithromycin - Impurity B (Freebase)

3-Deoxyazithromycin


  • Catalogue No.:PA 01 88020

  • CAS :

    307974-61-4

  • Molecular Formula : C38H72N2O11

  • Molecular Weight : 733

PA 01 88030

Azithromycin - Impurity C

3''-O-demethylazithromycin


  • Catalogue No.:PA 01 88030

  • CAS :

    620169-47-3

  • Molecular Formula : C37H70N2O12

  • Molecular Weight : 734.98

PA 01 88040

Azithromycin - Impurity D

14-Demethyl-14-(hydroxymethyl)azithromycin


  • Catalogue No.:PA 01 88040

  • CAS :

    612069-26-8

  • Molecular Formula : C38H72N2O13

  • Molecular Weight : 765.00

PA 01 88050

Azithromycin - Impurity E

3'-N,N-Di(desmethyl) Azithromycin


  • Catalogue No.:PA 01 88050

  • CAS :

    612069-27-9

  • Molecular Formula : C36H68N2O12

  • Molecular Weight : 720.93

PA 01 88060

Azithromycin - Impurity F

3'-N-Demethyl-3'-N-formylazithromycin


  • Catalogue No.:PA 01 88060

  • CAS :

    612069-28-0

  • Molecular Formula : C38H70N2O13

  • Molecular Weight : 762.97

PA 01 88070

Azithromycin - Impurity G

3'-N-demethyl-3'-N-[(4-methylphenyl)sulfonyl]azithromycin


  • Catalogue No.:PA 01 88070

  • CAS :

    612069-31-5

  • Molecular Formula : C44H76N2O14S

  • Molecular Weight : 889.14

PA 01 88080

Azithromycin - Impurity H

3'-N-[[4-(Acetylamino)phenyl]sulphonyl]3'-N-demethylazithromycin


  • Catalogue No.:PA 01 88080

  • CAS :

    612069-30-4

  • Molecular Formula : C45H77N3O15S

  • Molecular Weight : 932.17

PA 01 88090

Azithromycin - Impurity I

3'-N-Demethylazithromycin


  • Catalogue No.:PA 01 88090

  • CAS :

    172617-84-4

  • Molecular Formula : C37H70N2O12

  • Molecular Weight : 734.96

PA 01 88100

Azithromycin - Impurity J (Freebase)

Decladinosylazithromycin


  • Catalogue No.:PA 01 88100

  • CAS :

    117693-41-1

  • Molecular Formula : C30H58N2O9

  • Molecular Weight : 590.79

PA 01 88110

Azithromycin - Impurity K

C14,1''-Epoxyazithromycin


  • Catalogue No.:PA 01 88110

  • CAS :

    612534-95-9

  • Molecular Formula : C38H70N2O13

  • Molecular Weight : 762.99

PA 01 88120

Azithromycin - Impurity L

Azithromycin N-Oxide


  • Catalogue No.:PA 01 88120

  • CAS :

    90503-06-3

  • Molecular Formula : C38H72N2O13

  • Molecular Weight : 764.98

PA 01 88130

Azithromycin - Impurity M

3'-N,N-Di(desmethyl)-3'-N-formyl Azithromycin


  • Catalogue No.:PA 01 88130

  • CAS :

    765927-71-7

  • Molecular Formula : C37H68N2O13

  • Molecular Weight : 748.94

PA 01 88140

Azithromycin - Impurity N

3'-De(dimethylamino)-3'-oxoazithromycin


  • Catalogue No.:PA 01 88140

  • CAS :

    612069-25-7

  • Molecular Formula : C36H65NO13

  • Molecular Weight : 719.91

PA 01 88150

Azithromycin - Impurity O

2-Desethyl-2-propylazithromycin


  • Catalogue No.:PA 01 88150

  • CAS :

    763924-54-5

  • Molecular Formula : C39H74N2O12

  • Molecular Weight : 763.03

PA 01 88510

3'-N-Demethyl-3'-N-butyl-2-ol-azithromycin

3'-N-Demethyl-3'-N-butyl-2-ol-azithromycin


  • Catalogue No.:PA 01 88510

  • CAS :

    NA

  • Molecular Formula : C41H78N2O13

  • Molecular Weight : 807.06

PA 01 88520

N-Desmethyl Azithromycin B

N-Desmethyl Azithromycin B


  • Catalogue No.:PA 01 88520

  • CAS :

    857078-26-3

  • Molecular Formula : C37H70N2O11

  • Molecular Weight : 718.96

PA 01 88530

Azithromycin N-Ethyl

Azithromycin N-Ethyl


  • Catalogue No.:PA 01 88530

  • CAS :

    92594-45-1

  • Molecular Formula : C39H74N2O12

  • Molecular Weight : 763.01

PA STI 002160

3'-N-[[4-(Acetylamino)phenyl]sulfonyl]-3'-N-demethyl Azithromycin-d4

3'-N-[[4-(Acetylamino)phenyl]sulfonyl]-3'-N-demethyl Azithromycin-d4


  • Catalogue No.:PA STI 002160

  • CAS :

    NA

  • Molecular Formula : C45H73D4N3O15S

  • Molecular Weight : 936.19

PA STI 009760

Azithromycin-d3

Azithromycin-d3


  • Catalogue No.:PA STI 009760

  • CAS :

    163921-65-1

  • Molecular Formula : C38H69D3N2O12

  • Molecular Weight : 752.00

PA STI 009761

Azithromycin-13Cd3

Azithromycin-13Cd3


  • Catalogue No.:PA STI 009761

  • CAS :

    NA

  • Molecular Formula : C3713CH69D3N2O12

  • Molecular Weight : 753.00

PA STI 027180

Descladinose Azithromycin-d3

Descladinose Azithromycin-d3


  • Catalogue No.:PA STI 027180

  • CAS :

    2714432-16-1

  • Molecular Formula : C30H55D3N2O9

  • Molecular Weight : 593.81

PA USP1046056

Azithromycin (1046056)

Azithromycin (1046056)


  • Catalogue No.:PA USP1046056

  • CAS :

    117772-70-0

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1046090

Azithromycin N-Oxide (1046090)

Azithromycin N-Oxide (1046090)


  • Catalogue No.:PA USP1046090

  • CAS :

    90503-06-3

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1046067

Azithromycin Identity (1046067)

Azithromycin Identity (1046067)


  • Catalogue No.:PA USP1046067

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1046078

Desosaminylazithromycin (1046078)

Desosaminylazithromycin (1046078)


  • Catalogue No.:PA USP1046078

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1046089

N-Demethylazithromycin (1046089)

N-Demethylazithromycin (1046089)


  • Catalogue No.:PA USP1046089

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1046045

Azithromycin Related Compound F (3'-N-demethyl-3'-N-formylazithromycin) (1046045)

Azithromycin Related Compound F (3'-N-demethyl-3'-N-formylazithromycin) (1046045)


  • Catalogue No.:PA USP1046045

  • CAS :

    612069-28-0

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1046023

Azithromycin Related Compound H (3'-N-[[4-(acetylamino)phenyl]sulfonyl]-3'-N-demethylazithromycin) (1046023)

Azithromycin Related Compound H (3'-N-[[4-(acetylamino)phenyl]sulfonyl]-3'-N-demethylazithromycin) (1046023)


  • Catalogue No.:PA USP1046023

  • CAS :

    612069-30-4

  • Molecular Formula : NA

  • Molecular Weight : NA

PA EPY0000307

Azithromycin impurity A (Y0000307)

Azithromycin impurity A (Y0000307)


  • Catalogue No.:PA EPY0000307

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA EPY0000637

Azithromycin for peak identification (Y0000637)

Azithromycin for peak identification (Y0000637)


  • Catalogue No.:PA EPY0000637

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA EPY0000641

Azithromycin for system suitability (Y0000641)

Azithromycin for system suitability (Y0000641)


  • Catalogue No.:PA EPY0000641

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA EPY0000306

Azithromycin (Y0000306)

Azithromycin (Y0000306)


  • Catalogue No.:PA EPY0000306

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA USP1046012

Azithromycin Identification Mixture (1046012)

Azithromycin Identification Mixture (1046012)


  • Catalogue No.:PA USP1046012

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA 01 88540

3-Hydroxy Azithromycinoic Acid Sodium Salt

3-Hydroxy Azithromycinoic Acid Sodium Salt


  • Catalogue No.:PA 01 88540

  • CAS :

    NA

  • Molecular Formula : C30H59N2NaO10

  • Molecular Weight : 630.8

PA IPIMP 01 14

Azithromycin impurity A (IMP/01/14)


  • Catalogue No.:PA IPIMP 01 14

  • CAS :

    NA

  • Molecular Formula :

  • Molecular Weight : NA

PA IPIPRS 62 14

Azithromycin (IPRS/62/14)-from IPC


  • Catalogue No.:PA IPIPRS 62 14

  • CAS :

    NA

  • Molecular Formula :

  • Molecular Weight : NA

PA STI 009762

Azithromycin-d5

Azithromycin-d5


  • Catalogue No.:PA STI 009762

  • CAS :

    NA

  • Molecular Formula : C38H67D5N2O12

  • Molecular Weight : 754.03

PA 01 0881000

12-Deoxyerythromycin 9-Oxime

12-Deoxyerythromycin 9-Oxime


  • Catalogue No.:PA 01 0881000

  • CAS :

    53274-43-4

  • Molecular Formula : C37H68N2O12

  • Molecular Weight : 732.95

PA 01 0881001

Azaerythromycin A 11,12-Hydrogen Borate

Azaerythromycin A 11,12-Hydrogen Borate


  • Catalogue No.:PA 01 0881001

  • CAS :

    194809-66-0

  • Molecular Formula : C37H69BN2O13

  • Molecular Weight : 760.77

PA 01 88170

Azithromycin - Impurity Q

3'-N-[[4-(Acetylamino)phenyl]sulfonyl]-3'-(N,N-didemethyl)azithromycin


  • Catalogue No.:PA 01 88170

  • CAS :

    2095879-65-3

  • Molecular Formula : C44H75N3O15S

  • Molecular Weight : 918.15

PA 01 0881002

9a-aza-9a-homo erythromycin A

9a-aza-9a-homo erythromycin A


  • Catalogue No.:PA 01 0881002

  • CAS :

    76820-32-1

  • Molecular Formula : C37H68N2O13

  • Molecular Weight : 748.95

PA 01 0881003

(2R,3R,4S,6R)-4-(Dimethylamino)-6-methyltetrahydro-2H-pyran-2,3-diol

(2R,3R,4S,6R)-4-(Dimethylamino)-6-methyltetrahydro-2H-pyran-2,3-diol


  • Catalogue No.:PA 01 0881003

  • CAS :

    57794-18-0

  • Molecular Formula : C8H17NO3

  • Molecular Weight : 175.23

PA 01 0881004

(4R,5S,6S)-4-Methoxy-4,6-dimethyltetrahydro-2H-pyran-2,5-diol

(4R,5S,6S)-4-Methoxy-4,6-dimethyltetrahydro-2H-pyran-2,5-diol


  • Catalogue No.:PA 01 0881004

  • CAS :

    2089577-97-7

  • Molecular Formula : C8H16O4

  • Molecular Weight : 176.21

PA 01 0881005

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-Ethyl-3,4,10,11,13-pentahydroxy-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan-15-one

(2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-2-Ethyl-3,4,10,11,13-pentahydroxy-3,5,6,8,10,12,14-heptamethyl-1-oxa-6-azacyclopentadecan-15-one


  • Catalogue No.:PA 01 0881005

  • CAS :

    117693-42-2

  • Molecular Formula : C22H43NO7

  • Molecular Weight : 433.59

PA 01 0881006

(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

(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


  • Catalogue No.:PA 01 0881006

  • CAS :

    1914946-68-1

  • Molecular Formula : C30H57NO10

  • Molecular Weight : 591.78

PA 01 0881007

(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-heptamethyldodecahydro-[1,3,2]dioxaborolo[4,5-c][1]oxa[6]azacyclopentadecin-6(4H)-one

(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-heptamethyldodecahydro-[1,3,2]dioxaborolo[4,5-c][1]oxa[6]azacyclopentadecin-6(4H)-one


  • Catalogue No.:PA 01 0881007

  • CAS :

    NA

  • Molecular Formula : C38H71BN2O13

  • Molecular Weight : 774.8

PA 01 0881008

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

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


  • Catalogue No.:PA 01 0881008

  • CAS :

    NA

  • Molecular Formula : C43H74N2O14S

  • Molecular Weight : 875.13

PA 01 0881009

N-Nitroso Azithromycin

N-Nitroso Azithromycin


  • Catalogue No.:PA 01 0881009

  • CAS :

    NA

  • Molecular Formula : C37H69N3O13

  • Molecular Weight : 763.97

PA IPRSA013

Azithromycin (IPRSA013)

Azithromycin (IPRSA013)


  • Catalogue No.:PA IPRSA013

  • CAS :

    NA

  • Molecular Formula : NA

  • Molecular Weight : NA

PA 01 0881010

N-((2S,3R,4S,6R)-2-(((2R,3S,4R,5R,8S,10S,11S,12R,13R,14S)-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-methyltetrahydro-2H-pyran-4-yl)-N-methylnitrous Amide

N-((2S,3R,4S,6R)-2-(((2R,3S,4R,5R,8S,10S,11S,12R,13R,14S)-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-methyltetrahydro-2H-pyran-4-yl)-N-methylnitrous Amide


  • Catalogue No.:PA 01 0881010

  • CAS :

    NA

  • Molecular Formula : C37H69N3O13

  • Molecular Weight : 763.97

PA 01 0881011

(3R,4S,5R,6R,9R,10S,11S,12R,15R,Z)-12-(((2S,3R,4S,6R)-4-(Dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-6-ethyl-4-hydroxy-10-(((4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,9,11,13,15-hexamethyl-7,16-dioxa-2-azabicyclo[11.2.1]hexadec-1-en-8-one

(3R,4S,5R,6R,9R,10S,11S,12R,15R,Z)-12-(((2S,3R,4S,6R)-4-(Dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-6-ethyl-4-hydroxy-10-(((4R,5S,6S)-5-hydroxy-4-methoxy-4,6-dimethyltetrahydro-2H-pyran-2-yl)oxy)-3,5,9,11,13,15-hexamethyl-7,16-dioxa-2-azabicyclo[11.2.1]hexadec-1-en-8-one


  • Catalogue No.:PA 01 0881011

  • CAS :

    NA

  • Molecular Formula : C37H66N2O11

  • Molecular Weight : 714.94

PA 01 0881012

(Z)-12-((4-(Dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-6-ethyl-4,5,10-trihydroxy-3,5,9,11,13,15-hexamethyl-7,16-dioxa-2-azabicyclo[11.2.1]hexadec-1-en-8-one

(Z)-12-((4-(Dimethylamino)-3-hydroxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-6-ethyl-4,5,10-trihydroxy-3,5,9,11,13,15-hexamethyl-7,16-dioxa-2-azabicyclo[11.2.1]hexadec-1-en-8-one


  • Catalogue No.:PA 01 0881012

  • CAS :

    111247-91-7

  • Molecular Formula : C29H52N2O9

  • Molecular Weight : 572.74