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Cefalexin Related Products


SynZeal is a leading innovator in pharmaceutical reference standards. We supply high-quality Reference Standards of Cefalexin, pharmacopeial and non-pharmacopeial Cefalexin impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Cefalexin impurities reference standards are useful in pharmaceutical research. They are useful in product development, ANDA and DMF filing, quality control (QC), method validation, and stability studies. It is also useful in the identification of unknown impurities and the assessment of genotoxic potential.

Cefalexin-related products are thoroughly characterized. Cefalexin products are supplied with detailed COA & analytical data meeting regulatory compliance. We can also provide EP/USP traceable standards based on your requirements. The supplied products are re-tested at regular intervals.

Pharmaceutical Reference Standards

(RS)-2-Phenylglycine

Picture of (RS)-2-Phenylglycine
SZ CAT No:: SZ-C018024
CAS No: 2835-06-5
Mol.F.: C8H9NO2
Mol.Wt.: 151.2
Inv. Status: In Stock

Cefalexin

Picture of Cefalexin
SZ CAT No:: SZ-C018013
CAS No: 15686-71-2
Mol.F.: C16H17N3O4S
Mol.Wt.: 347.4
Inv. Status: In Stock, 3-4 days for Dispatch
Rel. CAS No: 23325-78-2 (hydrate)

Cefalexin EP Impurity B 

Picture of Cefalexin EP Impurity B 
SZ CAT No:: SZ-C018003
CAS No: 22252-43-3
Mol.F.: C8H10N2O3S 
Mol.Wt.: 214.3
Inv. Status: In Stock
Rel. CAS No: 111696-41-4 (HCl salt) ; 56871-82-0 (Na salt)
Rel. CAT No: SZ-C061003 , SZ-C184002 ,

Cefalexin EP Impurity C

Picture of Cefalexin EP Impurity C
SZ CAT No:: SZ-C018004
CAS No: 72528-40-6
Mol.F.: C24H24N4O5S 
Mol.Wt.: 480.5
Inv. Status: In Stock

Cefalexin EP Impurity D

Picture of Cefalexin EP Impurity D
SZ CAT No:: SZ-C018005
CAS No: 34876-35-2
Mol.F.: C5H6O2S 
Mol.Wt.: 130.2
Inv. Status: In Stock
Rel. CAT No: SZ-C061008 , SZ-C184005 ,

Cefalexin EP Impurity F

Picture of Cefalexin EP Impurity F
SZ CAT No:: SZ-C018007
CAS No: 79750-46-2
Mol.F.: C16H17N3O4S 
Mol.Wt.: 347.4
Inv. Status: In Stock

Cefalexin Impurity 6

Picture of Cefalexin Impurity 6
SZ CAT No:: SZ-C018028
CAS No: 27255-72-7
Mol.F.: C16H16N2O4S
Mol.Wt.: 332.4
Inv. Status: In Stock
Rel. CAS No: 39647-23-9 (sodium salt) ; 34708-38-8 (potassium salt)

Cefalexin Monohydrate

Picture of Cefalexin Monohydrate
SZ CAT No:: SZ-C018001
CAS No: 23325-78-2
Mol.F.: C16H17N3O4S : H2O
Mol.Wt.: 347.4 : 18.0
Inv. Status: In Stock
Rel. CAS No: 15686-71-2 (free base)

Cefalexin R-Sulfoxide

Picture of Cefalexin R-Sulfoxide
SZ CAT No:: SZ-C018020
CAS No: 52210-38-5
Mol.F.: C16H17N3O5S
Mol.Wt.: 363.4
Inv. Status: In Stock

Cefalexin S-Sulfoxide

Picture of Cefalexin S-Sulfoxide
SZ CAT No:: SZ-C018011
CAS No: 74708-55-7
Mol.F.: C16H17N3O5S
Mol.Wt.: 363.4
Inv. Status: In Stock

Cefalexin EP Impurity A 

Picture of Cefalexin EP Impurity A 
SZ CAT No:: SZ-C018002
CAS No: 875-74-1
Mol.F.: C8H9NO2 
Mol.Wt.: 151.2
Inv. Status: Out of Stock
Rel. CAS No: 25705-52-6 (HCl salt) ; 56337-83-8 (Na salt) ; 37661-32-8 (K salt) ; 91224-38-3 (Sulfate salt)
Rel. CAT No: SZ-A026012 , SZ-C067002 ,

Cefalexin Amide Impurity

Picture of Cefalexin Amide Impurity
SZ CAT No:: SZ-C018026
CAS No: NA
Mol.F.: C16H18N4O3S
Mol.Wt.: 346.4
Inv. Status: Custom Synthesis

Cefalexin Diketopiperazine

Picture of Cefalexin Diketopiperazine
SZ CAT No:: SZ-C018009
CAS No: 59865-11-1
Mol.F.: C16H17N3O4S
Mol.Wt.: 347.4
Inv. Status: Custom Synthesis

Cefalexin Diketopiperazine Monoacid

Picture of Cefalexin Diketopiperazine Monoacid
SZ CAT No:: SZ-C018023
CAS No: 1323247-65-9
Mol.F.: C16H19N3O5S
Mol.Wt.: 365.4
Inv. Status: Custom Synthesis

Cefalexin Diketopiperazine Sodium Salt

Picture of Cefalexin Diketopiperazine Sodium Salt
SZ CAT No:: SZ-C018021
CAS No: 62673-90-9
Mol.F.: C16H16N3O4S : Na
Mol.Wt.: 346.4 : 23.0
Inv. Status: Custom Synthesis
Rel. CAS No: 65870-52-2 (free base)

Cefalexin EP Impurity A (S-Isomer)

Picture of Cefalexin EP Impurity A (S-Isomer)
SZ CAT No:: SZ-C018030
CAS No: 2935-35-5
Mol.F.: C8H9NO2
Mol.Wt.: 151.2
Inv. Status: Custom Synthesis

Cefalexin Impurity 4

Picture of Cefalexin Impurity 4
SZ CAT No:: SZ-C018012
CAS No: NA
Mol.F.: C7H12N2OS
Mol.Wt.: 172.2
Inv. Status: Custom Synthesis

Cefalexin Impurity 5

Picture of Cefalexin Impurity 5
SZ CAT No:: SZ-C018025
CAS No: NA
Mol.F.: C32H31N5O6S
Mol.Wt.: 613.7
Inv. Status: Custom Synthesis

Cefalexin Impurity 7

Picture of Cefalexin Impurity 7
SZ CAT No:: SZ-C018033
CAS No: 56487-68-4
Mol.F.: C8H10N2O3S
Mol.Wt.: 214.2
Inv. Status: Custom Synthesis

Cefalexin Open-Ring Impurity

Picture of Cefalexin Open-Ring Impurity
SZ CAT No:: SZ-C018022
CAS No: NA
Mol.F.: C16H19N3O5S
Mol.Wt.: 365.4
Inv. Status: Custom Synthesis

Cephalexin Chloro Impurity

Picture of Cephalexin Chloro Impurity
SZ CAT No:: SZ-C018027
CAS No: 22039-59-4
Mol.F.: C16H16ClN3O4S
Mol.Wt.: 381.8
Inv. Status: Custom Synthesis

Cephalexin Sulfoxide

Picture of Cephalexin Sulfoxide
SZ CAT No:: SZ-C018029
CAS No: 56193-21-6
Mol.F.: C16H17N3O5S
Mol.Wt.: 363.4
Inv. Status: Custom Synthesis

N-Nitroso Cefalexin Diketopiperazine Monoacid

Picture of N-Nitroso Cefalexin Diketopiperazine Monoacid
SZ CAT No:: SZ-C018031
CAS No: NA
Mol.F.: C16H18N4O6S
Mol.Wt.: 394.4
Inv. Status: Custom Synthesis

Cefalexin EP Impurity E

Picture of Cefalexin EP Impurity E
SZ CAT No:: SZ-C018006
CAS No: 146794-70-9
Mol.F.: C13H18N2O4S 
Mol.Wt.: 298.4
Inv. Status: Under Synthesis

Cefalexin Impurity 1

Picture of Cefalexin Impurity 1
SZ CAT No:: SZ-C018008
CAS No: NA
Mol.F.: C16H19N3O5S
Mol.Wt.: 365.4
Inv. Status: Under QC Approval

L-Cephalexin

Picture of L-Cephalexin
SZ CAT No:: SZ-C018034
CAS No: 34632-04-7
Mol.F.: C16H17N3O4S
Mol.Wt.: 347.4
Inv. Status: Under Synthesis
Rel. CAS No: 2743427-28-1 (Hydrate)

Stable Isotopes And Metabolites

Cefalexin-d5 Hydrate

Picture of Cefalexin-d5 Hydrate
SZ CAT No:: SZ-C018D01
CAS No: NA
Mol.F.: C16H12D5N3O4S : H2O
Mol.Wt.: 352.4 : 18.0
Inv. Status: Custom Synthesis

Possible Nitroso Standards

N-Nitroso Cefalexin Diketopiperazine

Picture of N-Nitroso Cefalexin Diketopiperazine
SZ CAT No:: SZ-C018032
CAS No: NA
Mol.F.: C16H16N4O5S
Mol.Wt.: 376.4
Inv. Status: Custom Synthesis

N-Nitroso Cefalexin Diketopiperazine Monoacid

Picture of N-Nitroso Cefalexin Diketopiperazine Monoacid
SZ CAT No:: SZ-C018031
CAS No: NA
Mol.F.: C16H18N4O6S
Mol.Wt.: 394.4
Inv. Status: Custom Synthesis
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