Form
Powder
Appearance
White or almost white powder
Source
Semi-synthetic
Water Content (Karl Fisher)
3.0-5.0%
pH
4.5-7.5
Assay
≥ 825 µg/mg (on dried basis)
Impurities
Dimethylanilline: Meets the requirements
Cloxacillin sodium is a narrow spectrum β-lactam antibiotic of the penicillin class. Cloxacillin sodium is freely soluble in aqueous solution (0.014 mg/mL).
7081-44-9
C19H17ClN3NaO5S · H2O
475.88 g/mol
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. Unlike other members of the penicillin class, cloxacillin is resistant to β-lactamases.
2-8 °C
2941.10.3000
Cloxacillin targets primarily gram positive bacteria, especially β-lactamase producing Staphylococci.
Powder
White or almost white powder
Semi-synthetic
3.0-5.0%
4.5-7.5
≥ 825 µg/mg (on dried basis)
Dimethylanilline: Meets the requirements