Penicillin G potassium salt

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Synonyms: 6-(2-Phenylacetamido)penicillanic acid potassium salt, Potassium (2S,5R,6R)-3,3-dimethyl-7-oxo-6-(2-phenylacetamido)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate, Penicillin G potassium, Potassium [2S-(2α,5α,6β)]-3,3-dimethyl-7-oxo-6-(phenylacetamido)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate, Benzylpenicillin potassium salt

P93500-100.0 P93500-25.0 P93500-500.0
76347-954EA 99.62 USD
76347-954 76347-956 77510-414
Penicillin G potassium salt
Penicillin G potassium salt

Penicillin G potassium salt is a member of the penicillin class of antibiotics and is effective against a variety of gram-positive bacteria. As a narrow-spectrum antibiotic belonging to the beta-lactam class, it inhibits the synthesis of bacterial cell walls. It interferes with the formation of peptidoglycan, a crucial component of the bacterial cell wall. This weakens the cell wall and leads to the eventual rupture of the bacterial cell.


Penicillin G is effective against a wide range of Gram-positive bacteria, including Streptococcus, Staphylococcus, and some other species. However, it is not effective against Gram-negative bacteria due to their different cell wall structure.


Caution: Research or further manufacturing use only, not for food or drug use.

Formula: C₁₆H₁₇KN₂O₄S
MW: 372.49 g/mol
Melting Pt: 214 - 217°C
Storage Temperature: Refrigerator
MDL Number: MFCD00036193
CAS Number: 113-98-4
EINECS: 204-038-0

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Specification Test Results

Appearance White or Almost White Crystalline Powder
Assay 98 - 102 %
Crystallinity Pass
Identification Pass
Loss on Drying ≤ 1.0 %
pH (6% Solution @ 25 oC) 5.5 - 7.5
Potency 1440 - 1680 U/mg
Residual Solvent (Ethyl acetate) ≤ 0.2 %
Residual Solvent (N-Butyl Alcohol) ≤ 0.2 %
Non Animal Origin Conform
BSE/TSE Free Conform

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