Penicillin G Potassium Salt (Benzylpenicillin potassium, Potassium benzylpenicillinate)

Penicillin G is a narrow spectrum antibiotic derived from Streptococcus pneumoniae. It is the drug of choice for groups A, B, C and G streptococci, nonenterococcal group D streptococci, viridians group streptococci, and non-penicillinase producing staphylococcus. The potassium salt has been used to study murosomes of staphylococci+ and the penicillin-induced lysis of Streptococcus mutans, Effective against Gram-positive bacteria. Blocks cell wall formation in growing cells, resulting in accumulation of uracil nucleotides of muramic acid peptides. Acts at the final stage of cell wall synthesis and prevents cross-linking of peptidoglycan strands. Appearance: White to off-white powder , Purity:, >96%, Potency: 1440-1680 units/mg, pH (3%): 5.5 to 7.5, Absorption: (264nm): 0.80 to 0.88, (280nm): <0.10, (325nm): < 0.10 , Endotoxin: < 0.1EU/mg, Loss on Drying: <1%, Total Impurities: <1%, Penicillin Polymer: <0.08%, Solubility: 100mg/ml in water, Storage and Stability: Solutions should be filter sterilized and stored at 2-8°C for 1 week or at -20°C for more lengthy periods. Solutions are stable at 37°C for 3 days. The potassium salt is soluble in H2O at 100mg/ml., , Conforms to USP/BP specifications