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Pharmaceutical Reference Standards

Azithromycin Dihydrate

Picture of Azithromycin Dihydrate
CAT No: SZ-A040000
CAS No: 117772-70-0
Mol.F. : C38H72N2O12 : 2H2O
Mol.Wt. : 749.0 : (18.0)
Inv. Status: In Stock
Rel. CAS No : 83905-01-5 (free base) ; 121470-24-4 (hydrate) ; 90581-30-9 (HCl salt)
SZ-A040000
CAS No:117772-70-0
Mol.F.: C38H72N2O12 : 2H2O
Mol.Wt.: 749.0 : (18.0)
Inv. Status: In Stock
Rel. CAS No : 83905-01-5 (free base) ; 121470-24-4 (hydrate) ; 90581-30-9 (HCl salt)

Azithromycin EP Impurity A 

Picture of Azithromycin EP Impurity A 
CAT No: SZ-A040002
CAS No: 76801-85-9
Mol.F. : C37H70N2O12
Mol.Wt. : 735.0
Inv. Status: In Stock
SZ-A040002
CAS No:76801-85-9
Mol.F.: C37H70N2O12 
Mol.Wt.: 735.0 
Inv. Status: In Stock

Azithromycin EP Impurity B

Picture of Azithromycin EP Impurity B
CAT No: SZ-A040003
CAS No: 307974-61-4
Mol.F. : C38H72N2O11
Mol.Wt. : 733.0
Inv. Status: Custom Synthesis
SZ-A040003
CAS No:307974-61-4
Mol.F.: C38H72N2O11 
Mol.Wt.: 733.0 
Inv. Status: Custom Synthesis

Azithromycin EP Impurity C

Picture of Azithromycin EP Impurity C
CAT No: SZ-A040004
CAS No: 620169-47-3
Mol.F. : C37H70N2O12
Mol.Wt. : 735.0
Inv. Status: Under Synthesis
SZ-A040004
CAS No:620169-47-3
Mol.F.: C37H70N2O12 
Mol.Wt.: 735.0 
Inv. Status: Under Synthesis

Azithromycin EP Impurity D

Picture of Azithromycin EP Impurity D
CAT No: SZ-A040005
CAS No: 612069-26-8
Mol.F. : C38H72N2O13
Mol.Wt. : 765.0
Inv. Status: Under Synthesis
SZ-A040005
CAS No:612069-26-8
Mol.F.: C38H72N2O13 
Mol.Wt.: 765.0 
Inv. Status: Under Synthesis

Azithromycin EP Impurity E

Picture of Azithromycin EP Impurity E
CAT No: SZ-A040006
CAS No: 612069-27-9
Mol.F. : C36H68N2O12
Mol.Wt. : 720.9
Inv. Status: In Stock
SZ-A040006
CAS No:612069-27-9
Mol.F.: C36H68N2O12 
Mol.Wt.: 720.9 
Inv. Status: In Stock

Azithromycin EP Impurity F

Picture of Azithromycin EP Impurity F
CAT No: SZ-A040007
CAS No: 612069-28-0
Mol.F. : C38H70N2O13
Mol.Wt. : 763.0
Inv. Status: In Stock
SZ-A040007
CAS No:612069-28-0
Mol.F.: C38H70N2O13
Mol.Wt.: 763.0 
Inv. Status: In Stock

Azithromycin EP Impurity G

Picture of Azithromycin EP Impurity G
CAT No: SZ-A040008
CAS No: 612069-31-5
Mol.F. : C44H76N2O14S
Mol.Wt. : 889.1
Inv. Status: In Stock
SZ-A040008
CAS No:612069-31-5
Mol.F.: C44H76N2O14S 
Mol.Wt.: 889.1 
Inv. Status: In Stock

Azithromycin EP Impurity H

Picture of Azithromycin EP Impurity H
CAT No: SZ-A040009
CAS No: 612069-30-4
Mol.F. : C45H77N3O15S
Mol.Wt. : 932.2
Inv. Status: In Stock
SZ-A040009
CAS No:612069-30-4
Mol.F.: C45H77N3O15S 
Mol.Wt.: 932.2 
Inv. Status: In Stock

Azithromycin EP Impurity I

Picture of Azithromycin EP Impurity I
CAT No: SZ-A040010
CAS No: 172617-84-4
Mol.F. : C37H70N2O12
Mol.Wt. : 735
Inv. Status: In Stock
SZ-A040010
CAS No:172617-84-4
Mol.F.: C37H70N2O12
Mol.Wt.: 735
Inv. Status: In Stock

Azithromycin EP Impurity J

Picture of Azithromycin EP Impurity J
CAT No: SZ-A040011
CAS No: 117693-41-1
Mol.F. : C30H58N2O9
Mol.Wt. : 590.8
Inv. Status: In Stock
SZ-A040011
CAS No:117693-41-1
Mol.F.: C30H58N2O9 
Mol.Wt.: 590.8
Inv. Status: In Stock

Azithromycin EP Impurity K

Picture of Azithromycin EP Impurity K
CAT No: SZ-A040012
CAS No: 612534-95-9
Mol.F. : C38H70N2O13
Mol.Wt. : 763.0
Inv. Status: Custom Synthesis
SZ-A040012
CAS No:612534-95-9
Mol.F.: C38H70N2O13 
Mol.Wt.: 763.0 
Inv. Status: Custom Synthesis

Azithromycin EP Impurity L

Picture of Azithromycin EP Impurity L
CAT No: SZ-A040013
CAS No: 90503-06-3
Mol.F. : C38H72N2O13
Mol.Wt. : 765.0
Inv. Status: In Stock
SZ-A040013
CAS No:90503-06-3
Mol.F.: C38H72N2O13 
Mol.Wt.: 765.0 
Inv. Status: In Stock

Azithromycin EP Impurity M

Picture of Azithromycin EP Impurity M
CAT No: SZ-A040014
CAS No: 765927-71-7
Mol.F. : C37H68N2O13
Mol.Wt. : 749.0
Inv. Status: In Stock
SZ-A040014
CAS No:765927-71-7
Mol.F.: C37H68N2O13
Mol.Wt.: 749.0
Inv. Status: In Stock

Azithromycin EP Impurity N

Picture of Azithromycin EP Impurity N
CAT No: SZ-A040015
CAS No: 612069-25-7
Mol.F. : C36H65NO13
Mol.Wt. : 719.9
Inv. Status: In Stock
SZ-A040015
CAS No:612069-25-7
Mol.F.: C36H65NO13 
Mol.Wt.: 719.9 
Inv. Status: In Stock

Azithromycin EP Impurity O

Picture of Azithromycin EP Impurity O
CAT No: SZ-A040016
CAS No: 763924-54-5
Mol.F. : C39H74N2O12
Mol.Wt. : 763.0
Inv. Status: Custom Synthesis
SZ-A040016
CAS No:763924-54-5
Mol.F.: C39H74N2O12 
Mol.Wt.: 763.0 
Inv. Status: Custom Synthesis

Azithromycin Impurity Q

Picture of Azithromycin Impurity Q
CAT No: SZ-A040017
CAS No: NA
Mol.F. : C37H66N2O12
Mol.Wt. : 730.9
Inv. Status: Custom Synthesis
SZ-A040017
CAS No:NA
Mol.F.: C37H66N2O12 
Mol.Wt.: 730.9
Inv. Status: Custom Synthesis

Azithromycin Impurity R

Picture of Azithromycin Impurity R
CAT No: SZ-A040018
CAS No: 161193-44-8
Mol.F. : C37H66N2O12
Mol.Wt. : 730.9
Inv. Status: Custom Synthesis
SZ-A040018
CAS No:161193-44-8
Mol.F.: C37H66N2O12 
Mol.Wt.: 730.9
Inv. Status: Custom Synthesis

3-Hydroxy Azithromycinoic Acid Sodium Salt 

Picture of 3-Hydroxy Azithromycinoic Acid Sodium Salt 
CAT No: SZ-A040019
CAS No: NA
Mol.F. : C30H59N2O10 : Na
Mol.Wt. : 607.81 : 23.0
Inv. Status: Custom Synthesis
SZ-A040019
CAS No:NA
Mol.F.: C30H59N2O10 : Na
Mol.Wt.: 607.81 : 23.0
Inv. Status: Custom Synthesis

Azithromycin Impurity 1

Picture of Azithromycin Impurity 1
CAT No: SZ-A040020
CAS No: 2095879-65-3
Mol.F. : C44H75N3O15S
Mol.Wt. : 918.1
Inv. Status: Out of Stock
SZ-A040020
CAS No:2095879-65-3
Mol.F.: C44H75N3O15S 
Mol.Wt.: 918.1
Inv. Status: Out of Stock

Azithromycin Impurity 2

Picture of Azithromycin Impurity 2
CAT No: SZ-A040021
CAS No: NA
Mol.F. : C38H70N2O14
Mol.Wt. : 779
Inv. Status: Custom Synthesis
SZ-A040021
CAS No:NA
Mol.F.: C38H70N2O14
Mol.Wt.: 779
Inv. Status: Custom Synthesis

Azithromycin Impurity 3 Sodium Salt

Picture of Azithromycin Impurity 3 Sodium Salt
CAT No: SZ-A040022
CAS No: NA
Mol.F. : C38H73N2O13 : Na
Mol.Wt. : 766.01 : 23.0
Inv. Status: Custom Synthesis
SZ-A040022
CAS No:NA
Mol.F.: C38H73N2O13 : Na
Mol.Wt.: 766.01 : 23.0
Inv. Status: Custom Synthesis

Azaerythromycin A 11,12-hydrogen borate

Picture of Azaerythromycin A 11,12-hydrogen borate
CAT No: SZ-A040023
CAS No: 194809-66-0
Mol.F. : C37H69BN2O13
Mol.Wt. : 760.8
Inv. Status: Custom Synthesis
SZ-A040023
CAS No:194809-66-0
Mol.F.: C37H69BN2O13
Mol.Wt.: 760.8
Inv. Status: Custom Synthesis

Azithromycin Impurity P-Inhouse

Picture of Azithromycin Impurity P-Inhouse
CAT No: SZ-A040025
CAS No: 92594-45-1
Mol.F. : C39H74N2O12
Mol.Wt. : 763
Inv. Status: In Stock
SZ-A040025
CAS No:92594-45-1
Mol.F.: C39H74N2O12
Mol.Wt.: 763
Inv. Status: In Stock

Azithromycin Impurity 6

Picture of Azithromycin Impurity 6
CAT No: SZ-A040026
CAS No: NA
Mol.F. : C38H71BN2O13
Mol.Wt. : 774.8
Inv. Status: Custom Synthesis
SZ-A040026
CAS No:NA
Mol.F.: C38H71BN2O13
Mol.Wt.: 774.8
Inv. Status: Custom Synthesis

Azithromycin Impurity Zy

Picture of Azithromycin Impurity Zy
CAT No: SZ-A040027
CAS No: NA
Mol.F. : C41H78N2O13
Mol.Wt. : 807.1
Inv. Status: In Stock
SZ-A040027
CAS No:NA
Mol.F.: C41H78N2O13
Mol.Wt.: 807.1
Inv. Status: In Stock

Azithromycin Aglycone

Picture of Azithromycin Aglycone
CAT No: SZ-A040029
CAS No: 117693-42-2
Mol.F. : C22H43NO7
Mol.Wt. : 433.6
Inv. Status: Custom Synthesis
SZ-A040029
CAS No:117693-42-2
Mol.F.: C22H43NO7
Mol.Wt.: 433.6
Inv. Status: Custom Synthesis

Azithromycin Impurity 7

Picture of Azithromycin Impurity 7
CAT No: SZ-A040030
CAS No: 1914946-68-1
Mol.F. : C30H57NO10
Mol.Wt. : 591.8
Inv. Status: Custom Synthesis
SZ-A040030
CAS No:1914946-68-1
Mol.F.: C30H57NO10
Mol.Wt.: 591.8
Inv. Status: Custom Synthesis

N-Nitroso Azithromycin EP Impurity I

Picture of N-Nitroso Azithromycin EP Impurity I
CAT No: SZ-A040031
CAS No: NA
Mol.F. : C37H69N3O13
Mol.Wt. : 764.0
Inv. Status: In Stock
SZ-A040031
CAS No:NA
Mol.F.: C37H69N3O13
Mol.Wt.: 764.0
Inv. Status: In Stock

Azithromycin

Picture of Azithromycin
CAT No: SZ-A040032
CAS No: 83905-01-5
Mol.F. : C38H72N2O12
Mol.Wt. : 749
Inv. Status: Custom Synthesis
Rel. CAS No : 117772-70-0 (dihydrate) ; 121470-24-4 (hydrate) ; 90581-30-9 (HCl salt)
SZ-A040032
CAS No:83905-01-5
Mol.F.: C38H72N2O12
Mol.Wt.: 749
Inv. Status: Custom Synthesis
Rel. CAS No : 117772-70-0 (dihydrate) ; 121470-24-4 (hydrate) ; 90581-30-9 (HCl salt)

3-Hydroxy Azithromycinoic Acid

Picture of 3-Hydroxy Azithromycinoic Acid
CAT No: SZ-A040036
CAS No: 2365312-76-9
Mol.F. : C30H60N2O10
Mol.Wt. : 608.8
Inv. Status: Custom Synthesis
SZ-A040036
CAS No:2365312-76-9
Mol.F.: C30H60N2O10
Mol.Wt.: 608.8
Inv. Status: Custom Synthesis

Stable Isotopes And Metabolites

Azithromycin-d3

Picture of Azithromycin-d3
CAT No: SZ-A040D01
CAS No: 163921-65-1
Mol.F. : C38H69D3N2O12
Mol.Wt. : 752
Inv. Status: Custom Synthesis
SZ-A040D01
CAS No:163921-65-1
Mol.F.: C38H69D3N2O12
Mol.Wt.: 752
Inv. Status: Custom Synthesis

Azithromycin-13C-d3

Picture of Azithromycin-13C-d3
CAT No: SZ-A040D02
CAS No: NA
Mol.F. : C3713CH69D3N2O12
Mol.Wt. : 753.0
Inv. Status: Custom Synthesis
SZ-A040D02
CAS No:NA
Mol.F.: C3713CH69D3N2O12
Mol.Wt.: 753.0
Inv. Status: Custom Synthesis

Possible Nitroso Standards

N-Nitroso Azithromycin

Picture of N-Nitroso Azithromycin
CAT No: SZ-A040028
CAS No: NA
Mol.F. : C37H69N3O13
Mol.Wt. : 764
Inv. Status: In Stock
SZ-A040028
CAS No:NA
Mol.F.: C37H69N3O13
Mol.Wt.: 764
Inv. Status: In Stock

N-Nitroso Azithromycin EP Impurity M

Picture of N-Nitroso Azithromycin EP Impurity M
CAT No: SZ-A040034
CAS No: NA
Mol.F. : C37H67N3O14
Mol.Wt. : 778.0
Inv. Status: Custom Synthesis
SZ-A040034
CAS No:NA
Mol.F.: C37H67N3O14
Mol.Wt.: 778.0
Inv. Status: Custom Synthesis

N-Nitroso Azithromycin EP Impurity A

Picture of N-Nitroso Azithromycin EP Impurity A
CAT No: SZ-A040035
CAS No: NA
Mol.F. : C37H69N3O13
Mol.Wt. : 764.0
Inv. Status: Custom Synthesis
SZ-A040035
CAS No:NA
Mol.F.: C37H69N3O13
Mol.Wt.: 764.0
Inv. Status: Custom Synthesis