Cephalexin

Cephalexin is the first oral first-generation cephalosporin to enter widespread clinical use, effective against Gram-positive pathogens for skin, soft-tissue and urinary tract infections. Simson Pharma's Cephalexin reference standard and impurities support the high-volume compendial testing this long-established generic antibiotic demands.

Simson Pharma Global Ltd. (UK) and Simson Pharma Global LLC (USA) supply high-quality Cephalexin Reference Standards, pharmacopoeial reference materials, and its related impurities to pharmaceutical manufacturers, CROs, analytical laboratories, universities, and regulatory organizations worldwide. To service the Europe and America market efficiently, Simson Pharma Limited has set up Simson Pharma Global Ltd. in United Kingdom and Simson Pharma Global LLC in USA respectively.

Pharmaceutical Reference Standards / Impurity Standards

Cephalexin Monohydrate
Cephalexin Monohydrate
  • CAT. No.C220000A
  • CAS. No.23325-78-2
  • Mol. F.C16H19N3O5S
  • Mol. W.365.40 g/mol
  • Stock Status:Instock
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Cefalexin EP Impurity A
Cefalexin EP Impurity A
  • CAT. No.C220001
  • CAS. No.875-74-1
  • Mol. F.C8H9NO2
  • Mol. W.151.16 g/mol
  • Stock Status:Instock
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Cefalexin EP Impurity B
Cefalexin EP Impurity B
  • CAT. No.C220002
  • CAS. No.22252-43-3
  • Mol. F.C8H10N2O3S
  • Mol. W.214.24 g/mol
  • Stock Status:Instock
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Cefalexin EP Impurity D
Cefalexin EP Impurity D
  • CAT. No.C220003
  • CAS. No.34876-35-2
  • Mol. F.C5H6O2S
  • Mol. W.130.17 g/mol
  • Stock Status:Instock
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Cefalexin EP Impurity F Trifluoroacetate
Cefalexin EP Impurity F Trifluoroacetate
  • CAT. No.C220004
  • CAS. No.79750-46-2 (free base)
  • Mol. F.C18H18F3N3O6S
  • Mol. W.461.41 g/mol
  • Stock Status:Limited Stock
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Cefalexin EP Impurity C
Cefalexin EP Impurity C
  • CAT. No.C220005
  • CAS. No.72528-40-6
  • Mol. F.C24H24N4O5S
  • Mol. W.480.54 g/mol
  • Stock Status:Instock
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Cefalexin EP Impurity E
Cefalexin EP Impurity E
  • CAT. No.C220006
  • CAS. No.146794-70-9
  • Mol. F.C13H18N2O4S
  • Mol. W.298.36 g/mol
  • Stock Status:Instock
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Cephalexin Sulfoxide
Cephalexin Sulfoxide
  • CAT. No.C220007
  • CAS. No.56193-21-6
  • Mol. F.C16H17N3O5S
  • Mol. W.363.39g/mol
  • Stock Status:Instock
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Cephalexine RC K
Cephalexine RC K
  • CAT. No.C220008
  • CAS. No.NA
  • Mol. F.C24H24N4O5S.CH2O2
  • Mol. W.480.5g/mol
  • Stock Status:Limited Stock
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Cephalexine RC D
Cephalexine RC D
  • CAT. No.C220009
  • CAS. No.110-02-1
  • Mol. F.C4H4S.
  • Mol. W.84.14g/mol
  • Stock Status:Custom Synthesis
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Cefalexin EP Impurity F
Cefalexin EP Impurity F
  • CAT. No.C220010
  • CAS. No.79750-46-2
  • Mol. F.C16H17N3O4S
  • Mol. W.347.39 g/mol
  • Stock Status:Limited Stock
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L-Cephalexin
L-Cephalexin
  • CAT. No.C220011
  • CAS. No.34632-04-7
  • Mol. F.C16H17N3O4S
  • Mol. W.347.39 g/mol
  • Stock Status:Instock
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D-Phenylglycinamide
D-Phenylglycinamide
  • CAT. No.C220013
  • CAS. No.6485-67-2
  • Mol. F.C8H10N2O
  • Mol. W.150.18 g/mol
  • Stock Status:Instock
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Cephalexin Diketopiperazine Hydrochloride
Cephalexin Diketopiperazine Hydrochloride
  • CAT. No.C220014
  • CAS. No.NA
  • Mol. F.C16H18ClN3O4S
  • Mol. W.383.85 g/mol
  • Stock Status:Custom Synthesis
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Cefalexin Diketopiperazine
Cefalexin Diketopiperazine
  • CAT. No.C220014A
  • CAS. No.59865-11-1
  • Mol. F.C16H17N3O4S
  • Mol. W.347.39 g/mol
  • Stock Status:Under Synthesis
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Cephalexin R-Sulfoxide Hydrochloride
Cephalexin R-Sulfoxide Hydrochloride
  • CAT. No.C220015
  • CAS. No.52210-38-5(free base)
  • Mol. F.C16H17N3O5S.HCl
  • Mol. W.399.85 g/mol
  • Stock Status:Custom Synthesis
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Cephalexin S-Sulfoxide
Cephalexin S-Sulfoxide
  • CAT. No.C220015A
  • CAS. No.74708-55-7
  • Mol. F.C16H17N3O5S
  • Mol. W.363.39 g/mol
  • Stock Status:Custom Synthesis
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Chloro Cephalexin
Chloro Cephalexin
  • CAT. No.C220016
  • CAS. No.22039-59-4
  • Mol. F.C16H16ClN3O4S
  • Mol. W.381.83 g/mol
  • Stock Status:Under Synthesis
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3-Hydroxy-4-methyl-2(5H)-thiophenone
3-Hydroxy-4-methyl-2(5H)-thiophenone
  • CAT. No.C220018
  • CAS. No.34876-35-2
  • Mol. F.C5H6O2S
  • Mol. W.130.16 g/mol
  • Stock Status:Custom Synthesis
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Cephalexin Diketopiperazine Monoacid
Cephalexin Diketopiperazine Monoacid
  • CAT. No.C220019
  • CAS. No.1323247-65-9
  • Mol. F.C16H19N3O5S
  • Mol. W.365.40 g/mol
  • Stock Status:Custom Synthesis
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Delta-2-Cephalexin triethylamine salt
Delta-2-Cephalexin triethylamine salt
  • CAT. No.C220021
  • CAS. No.79750-46-2(Base)
  • Mol. F.C22H32N4O4S
  • Mol. W.448.58 g/mol
  • Stock Status:Custom Synthesis
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Cefalexin Impurity 5
Cefalexin Impurity 5
  • CAT. No.C220022
  • CAS. No.NA
  • Mol. F.C32H31N5O6S
  • Mol. W.613.68 g/mol
  • Stock Status:Custom Synthesis
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Cefalexin Amide Impurity
Cefalexin Amide Impurity
  • CAT. No.C220023
  • CAS. No.NA
  • Mol. F.C16H18N4O3S
  • Mol. W.346.40 g/mol
  • Stock Status:Custom Synthesis
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Cefalexin Impurity 6
Cefalexin Impurity 6
  • CAT. No.C220024
  • CAS. No.27255-72-7
  • Mol. F.C16H16N2O4S
  • Mol. W.332.40 g/mol
  • Stock Status:Custom Synthesis
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Cefalexin Diketopiperazine Delta-3 Isomer
Cefalexin Diketopiperazine Delta-3 Isomer
  • CAT. No.C220025
  • CAS. No.65870-52-2
  • Mol. F.C16H17N3O4S
  • Mol. W.347.39 g/mol
  • Stock Status:Custom Synthesis
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Cephalexin Diketopiperazine Sodium Salt
Cephalexin Diketopiperazine Sodium Salt
  • CAT. No.C220026
  • CAS. No.62673-90-9
  • Mol. F.C16H17N3O4S.Na
  • Mol. W.370.38 g/mol
  • Stock Status:Custom Synthesis
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L-Cephalexin Trifluoroacetate
L-Cephalexin Trifluoroacetate
  • CAT. No.C220027
  • CAS. No.NA
  • Mol. F.C16H17N3O4S.C2HF3O2
  • Mol. W.461.41 g/mol
  • Stock Status:Instock
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Cefalexin R-Sulfoxide
Cefalexin R-Sulfoxide
  • CAT. No.C220028
  • CAS. No.52210-38-5
  • Mol. F.C16H17N3O5S
  • Mol. W.363.40 g/mol
  • Stock Status:Custom Synthesis
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Deacetylcephalosporin C
Deacetylcephalosporin C
  • CAT. No.C220029
  • CAS. No.1476-46-6
  • Mol. F.C14H19N3O7S
  • Mol. W.373.38 g/mol
  • Stock Status:Custom Synthesis
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Cephalexin Dimer
Cephalexin Dimer
  • CAT. No.C220030
  • CAS. No.NA
  • Mol. F.C32H32N6O7S2
  • Mol. W.676.80 g/mol
  • Stock Status:Custom Synthesis
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Cephalexin Ethyl Homolog
Cephalexin Ethyl Homolog
  • CAT. No.C220031
  • CAS. No.36114-06-04
  • Mol. F.C17H19N3O4S
  • Mol. W.361.40 g/mol
  • Stock Status:Custom Synthesis
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Isotope Labelled Compounds

Cephalexin D5 Monohydrate
Cephalexin D5 Monohydrate
  • CAT. No.C220012A
  • CAS. No.NA
  • Mol. F.C16H12D5N3O4S.H2O
  • Mol. W.370.43 g/mol
  • Stock Status:Limited Stock
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