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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
Same As : SZ-A026012, SZ-C067002,
Rel. CAS No : 25705-52-6 (HCl salt) ; 56337-83-8 (Na salt) ; 37661-32-8 (K salt) ; 91224-38-3 (Sulfate salt)
SZ-C018002
CAS No:875-74-1
Mol.F.: C8H9NO2 
Mol.Wt.: 151.2
Inv. Status: Out of Stock
Same As : SZ-A026012, SZ-C067002,
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
Same As : SZ-C061003,
Rel. CAS No : 111696-41-4 (HCl salt) ; 56871-82-0 (Na salt)
SZ-C018003
CAS No:22252-43-3
Mol.F.: C8H10N2O3S 
Mol.Wt.: 214.3
Inv. Status: Custom Synthesis
Same As : SZ-C061003,
Rel. CAS No : 111696-41-4 (HCl salt) ; 56871-82-0 (Na salt)

Cefalexin EP Impurity C

Picture of Cefalexin EP Impurity C
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

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

Cefalexin EP Impurity E

Picture of Cefalexin EP Impurity E
CAT No: SZ-C018006
CAS No: 146794-70-9
Mol.F. : C13H18N2O4S
Mol.Wt. : 298.4
Inv. Status: Custom Synthesis
Same As : SZ-C061009,
SZ-C018006
CAS No:146794-70-9
Mol.F.: C13H18N2O4S 
Mol.Wt.: 298.4
Inv. Status: Custom Synthesis
Same As : SZ-C061009,

Cefalexin EP Impurity F

Picture of Cefalexin EP Impurity F
CAT No: SZ-C018007
CAS No: N/A
Mol.F. : C16H17N3O4S
Mol.Wt. : 347.4
Inv. Status: In Stock
SZ-C018007
CAS No:N/A
Mol.F.: C16H17N3O4S 
Mol.Wt.: 347.4
Inv. Status: In Stock

Cefalexin Impurity 1

Picture of Cefalexin Impurity 1
CAT No: SZ-C018008
CAS No: N/A
Mol.F. : C16H19N3O5S
Mol.Wt. : 365.4
Inv. Status: Under Synthesis
SZ-C018008
CAS No:N/A
Mol.F.: C16H19N3O5S
Mol.Wt.: 365.4
Inv. Status: Under Synthesis

Cefalexin Impurity 2

Picture of Cefalexin Impurity 2
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 Impurity 3

Picture of Cefalexin Impurity 3
CAT No: SZ-C018010
CAS No: N/A
Mol.F. : C16H19N3O5S
Mol.Wt. : 365.4
Inv. Status: Custom Synthesis
SZ-C018010
CAS No:N/A
Mol.F.: C16H19N3O5S
Mol.Wt.: 365.4
Inv. Status: Custom Synthesis

Cephalexin S-Sulfoxide

Picture of Cephalexin S-Sulfoxide
CAT No: SZ-C018011
CAS No: 74708-55-7
Mol.F. : C16H17N3O5S
Mol.Wt. : 363.4
Inv. Status: Custom Synthesis
SZ-C018011
CAS No:74708-55-7
Mol.F.: C16H17N3O5S
Mol.Wt.: 363.4
Inv. Status: Custom Synthesis

Cefalexin Impurity 4

Picture of Cefalexin Impurity 4
CAT No: SZ-C018012
CAS No: N/A
Mol.F. : C7H12N2OS
Mol.Wt. : 172.2
Inv. Status: Custom Synthesis
SZ-C018012
CAS No:N/A
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: Custom Synthesis
Rel. CAS No : 23325-78-2 (hydrate)
SZ-C018013
CAS No:15686-71-2
Mol.F.: C16H17N3O4S
Mol.Wt.: 347.4
Inv. Status: Custom Synthesis
Rel. CAS No : 23325-78-2 (hydrate)

Cefalexin EP Impurity A Hydrochloride 

Picture of Cefalexin EP Impurity A Hydrochloride 
CAT No: SZ-C018014
CAS No: 25705-52-6
Mol.F. : C8H9NO2 : HCl
Mol.Wt. : 151.2 : 36.5
Inv. Status: Custom Synthesis
Same As : SZ-A026039, SZ-C067013,
Rel. CAS No : 875-74-1 (free base) ; 56337-83-8 (Na salt) ; 37661-32-8 (K salt) ; 91224-38-3 (Sulfate salt)
SZ-C018014
CAS No:25705-52-6
Mol.F.: C8H9NO2 : HCl
Mol.Wt.: 151.2 : 36.5
Inv. Status: Custom Synthesis
Same As : SZ-A026039, SZ-C067013,
Rel. CAS No : 875-74-1 (free base) ; 56337-83-8 (Na salt) ; 37661-32-8 (K salt) ; 91224-38-3 (Sulfate salt)

Cefalexin EP Impurity A Sodium salt

Picture of Cefalexin EP Impurity A Sodium salt
CAT No: SZ-C018015
CAS No: 56337-83-8
Mol.F. : C8H9NO2 : Na
Mol.Wt. : 151.2 : 23.0
Inv. Status: Custom Synthesis
Same As : SZ-A026040, SZ-C067011,
Rel. CAS No : 25705-52-6 (HCl salt) ; 875-74-1 (free base) ; 37661-32-8 (K salt) ; 91224-38-3 (Sulfate salt)
SZ-C018015
CAS No:56337-83-8
Mol.F.: C8H9NO2 : Na
Mol.Wt.: 151.2 : 23.0
Inv. Status: Custom Synthesis
Same As : SZ-A026040, SZ-C067011,
Rel. CAS No : 25705-52-6 (HCl salt) ; 875-74-1 (free base) ; 37661-32-8 (K salt) ; 91224-38-3 (Sulfate salt)

Cefalexin EP Impurity A Potassium salt

Picture of Cefalexin EP Impurity A Potassium salt
CAT No: SZ-C018016
CAS No: 37661-32-8
Mol.F. : C8H9NO2 : K
Mol.Wt. : 151.2 : 39.1
Inv. Status: Custom Synthesis
Same As : SZ-A026041, SZ-C067012,
Rel. CAS No : 25705-52-6 (HCl salt) ; 56337-83-8 (Na salt) ; 875-74-1 (free base) ; 91224-38-3 (Sulfate salt)
SZ-C018016
CAS No:37661-32-8
Mol.F.: C8H9NO2 : K
Mol.Wt.: 151.2 : 39.1
Inv. Status: Custom Synthesis
Same As : SZ-A026041, SZ-C067012,
Rel. CAS No : 25705-52-6 (HCl salt) ; 56337-83-8 (Na salt) ; 875-74-1 (free base) ; 91224-38-3 (Sulfate salt)

Cefalexin EP Impurity A Sulfate salt

Picture of Cefalexin EP Impurity A Sulfate salt
CAT No: SZ-C018017
CAS No: 91224-38-3
Mol.F. : C8H9NO2 : 1/2(H2SO4)
Mol.Wt. : 151.2 : 1/2(98.1)
Inv. Status: Custom Synthesis
Same As : SZ-A026038, SZ-C067014,
Rel. CAS No : 25705-52-6 (HCl salt) ; 56337-83-8 (Na salt) ; 37661-32-8 (K salt) ; 875-74-1 (free base)
SZ-C018017
CAS No:91224-38-3
Mol.F.: C8H9NO2 : 1/2(H2SO4)
Mol.Wt.: 151.2 : 1/2(98.1)
Inv. Status: Custom Synthesis
Same As : SZ-A026038, SZ-C067014,
Rel. CAS No : 25705-52-6 (HCl salt) ; 56337-83-8 (Na salt) ; 37661-32-8 (K salt) ; 875-74-1 (free base)

Cefalexin EP Impurity B Hydrochloride

Picture of Cefalexin EP Impurity B Hydrochloride
CAT No: SZ-C018018
CAS No: 111696-41-4
Mol.F. : C8H10N2O3S : HCl
Mol.Wt. : 214.2 : 36.5
Inv. Status: Custom Synthesis
Rel. CAS No : 22252-43-3 (free base) ; 56871-82-0 (Na salt)
SZ-C018018
CAS No:111696-41-4
Mol.F.: C8H10N2O3S : HCl
Mol.Wt.: 214.2 : 36.5
Inv. Status: Custom Synthesis
Rel. CAS No : 22252-43-3 (free base) ; 56871-82-0 (Na salt)

Cefalexin EP Impurity B Sodium salt

Picture of Cefalexin EP Impurity B Sodium salt
CAT No: SZ-C018019
CAS No: 56871-82-0
Mol.F. : C8H10N2O3S : Na
Mol.Wt. : 214.2 : 23.0
Inv. Status: Custom Synthesis
Rel. CAS No : 111696-41-4 (HCl salt) ; 22252-43-3 (free base)
SZ-C018019
CAS No:56871-82-0
Mol.F.: C8H10N2O3S : Na
Mol.Wt.: 214.2 : 23.0
Inv. Status: Custom Synthesis
Rel. CAS No : 111696-41-4 (HCl salt) ; 22252-43-3 (free base)