Penicillin G

Penicillin G structural formula

CAS Number61-33-6
Molecular FormulaC16H18N2O4S
Molecular Weight334.391
  • Penicillin G
  • (2S,5R,6R)-3,3-Dimethyl-7-oxo-6-(2-phenylacetamido)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
  • 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-[(2-phenylacetyl)amino]-, (2S,5R,6R)-
  • 61-33-6
  • 4-27-00-05861
  • 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-[(phenylacetyl)amino]- (2S,5R,6R)-
  • (5R,6R)-Benzylpenicillin
  • 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-(2-phenylacetamido)-
  • 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-[(2-phenylacetyl)amino]- (2S,5R,6R)-
  • 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-[(phenylacetyl)amino]- [2S-(2?,5?,6?)]-
  • 6-(2-phenylacetamido)penicillanic acid
  • 6-(2-Phenylacetamido)penicillansaure
  • acide 6-(2-phenylacetamido)penicillanique
  • acido 6-(2-fenilacetamido)penicilanico
  • Benzyl-6-aminopenicillinic acid
  • Benzylpenicillin
  • Benzylpenicillin G
  • Benzylpenicillinic acid
  • Cilloral
  • Cilopen
  • Dropcillin
  • Free benzylpenicillin
  • Free penicillin G
  • Free penicillin II
  • Gelacillin
  • Liquacillin
  • NSC 193396
  • Penicillin, (phenylmethyl)-
  • Penicillinic acid, (phenylmethyl)-
  • Pfizerpen
  • Pharmacillin
  • Phenylacetamidopenicillanic acid
  • Phenylacetyl-6-aminopenicillanic acid
  • Pradupen
  • Specilline G
  • Ursopen
  • Abbocillin
  • Benzopenicillin
  • Benzyl penicillin
  • BRN 0044740
  • Compocillin G
  • EINECS 200-506-3
  • Galofak
  • Pencillin G
  • Penicillinic acid, benzyl-
  • (Phenylmethyl)penicillin
  • (Phenylmethyl)penicillinic acid
  • 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-(2-phenylacetamido)-
  • 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-((phenylacetyl)amino)-, (2S-(2alpha,5alpha,6beta))-
  • Bencilpenicilina
  • Benzylpenicilline
  • Benzylpenicillinum
  • UNII-Q42T66VG0C
  • (2S,5R,6R)-3,3-dimethyl-7-oxo-6-(phenylacetamido)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
  • PG
  • bensylpenicillin
  • benzyl benicillin
  • benzylpenicillinic acid


Separation of Penicillin G on Newcrom R1 HPLC column

February 16, 2018
Separation of Penicillin G on Newcrom C18 HPLC column

Penicillin G can be analyzed by this reverse phase (RP) HPLC method with simple conditions. The mobile phase contains an acetonitrile (MeCN), water, and phosphoric acid. For Mass-Spec (MS) compatible applications the phosphoric acid needs to be replaced with formic acid. Smaller 3 µm particles columns available for fast UPLC applications. This liquid chromatography method is scalable and can be used for isolation impurities in preparative separation. It also suitable for pharmacokinetics.

Application Column

Newcrom R1

The Newcrom columns are a family of reverse-phase-based columns. Newcrom A, AH, B, and BH are all mixed-mode columns with either positive or negative ion-pairing groups attached to either short (25 Å) or long (100 Å) ligand chains. Newcrom R1 is a special reverse-phase column with low silanol activity.

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Application Analytes:
Penicillin G
The result was obtained by a proprietary SIELC algorithm. It may deviate from the actual experimental data. The experimental data are available upon request. Contact us by e-mail: or by phone: 847-229-2629.