Form
Powder
Appearance
White crystalline powder
Source
Semi-synthetic
Water Content (Karl Fisher)
3.5-5.0%
pH
4.5-7.5
Assay
(On dried basis): 815-950µg/mg
Oxacillin sodium is a freely soluble (50 mg/mL) narrow spectrum β-lactam antibiotic of the penicillin class.
7240-38-2 (monohydrate)
C19H18N3NaO5S (anhydrous basis)
423.42 (anhydrous basis)
β-lactams interfere with PBP (penicillin binding protein) activity involved in the final phase of peptidoglycan synthesis. PBP’s are enzymes which catalyze a pentaglycine crosslink between alanine and lysine residues providing additional strength to the cell wall. Without a pentaglycine crosslink, the integrity of the cell wall is severely compromised and ultimately leads to cell lysis and death. Resistance to β-lactams is commonly due to cells containing plasmid encoded β-lactamases. Oxacillin however, is resistant to the degradative effects of β-lactamases.
2-8 °C.
2941.10.3000
Oxacillin is used primarily against gram positive organisms namely resistant Staphylococcus species.
Powder
White crystalline powder
Semi-synthetic
3.5-5.0%
4.5-7.5
(On dried basis): 815-950µg/mg