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Pharmaceutical Reference Standards

Cefalexin Monohydrate

Picture of Cefalexin Monohydrate
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)
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 EP Impurity A 

Picture of Cefalexin EP Impurity A 
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,
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)

Cefalexin EP Impurity B 

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

Cefalexin EP Impurity C

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CAT No: SZ-C018004
CAS No: 72528-40-6
Mol.F. : C24H24N4O5S
Mol.Wt. : 480.5
Inv. Status: In Stock
SZ-C018004
CAS No:72528-40-6
Mol.F.: C24H24N4O5S 
Mol.Wt.: 480.5
Inv. Status: In Stock

Cefalexin EP Impurity D

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CAT No: SZ-C018005
CAS No: 34876-35-2
Mol.F. : C5H6O2S
Mol.Wt. : 130.2
Inv. Status: Out of Stock
Rel. CAT No : SZ-C061008, SZ-C184005,
SZ-C018005
CAS No:34876-35-2
Mol.F.: C5H6O2S 
Mol.Wt.: 130.2
Inv. Status: Out of Stock

Cefalexin EP Impurity E

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CAT No: SZ-C018006
CAS No: 146794-70-9
Mol.F. : C13H18N2O4S
Mol.Wt. : 298.4
Inv. Status: Custom Synthesis
SZ-C018006
CAS No:146794-70-9
Mol.F.: C13H18N2O4S 
Mol.Wt.: 298.4
Inv. Status: Custom Synthesis

Cefalexin EP Impurity F

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

Cefalexin Impurity 1

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CAT No: SZ-C018008
CAS No: NA
Mol.F. : C16H19N3O5S
Mol.Wt. : 365.4
Inv. Status: Under Synthesis
SZ-C018008
CAS No:NA
Mol.F.: C16H19N3O5S
Mol.Wt.: 365.4
Inv. Status: Under Synthesis

Cefalexin Diketopiperazine

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CAT No: SZ-C018009
CAS No: 59865-11-1
Mol.F. : C16H17N3O4S
Mol.Wt. : 347.4
Inv. Status: Under Synthesis
SZ-C018009
CAS No:59865-11-1
Mol.F.: C16H17N3O4S
Mol.Wt.: 347.4
Inv. Status: Under Synthesis

Cefalexin S-Sulfoxide

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

Cefalexin Impurity 4

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CAT No: SZ-C018012
CAS No: NA
Mol.F. : C7H12N2OS
Mol.Wt. : 172.2
Inv. Status: Custom Synthesis
SZ-C018012
CAS No:NA
Mol.F.: C7H12N2OS
Mol.Wt.: 172.2
Inv. Status: Custom Synthesis

Cefalexin

Picture of Cefalexin
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)
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 R-Sulfoxide

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

Cefalexin Diketopiperazine Sodium Salt

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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)
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 Open-Ring Impurity

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CAT No: SZ-C018022
CAS No: NA
Mol.F. : C16H19N3O5S
Mol.Wt. : 365.4
Inv. Status: Custom Synthesis
SZ-C018022
CAS No:NA
Mol.F.: C16H19N3O5S
Mol.Wt.: 365.4
Inv. Status: Custom Synthesis

Cefalexin Diketopiperazine Monoacid

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

Stable Isotopes And Metabolites

Cefalexin-d5 Hydrate

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