Oxacillin Sodium Salt Monohydrate, 25g, is a laboratory-grade antibiotic used for microbiological research and antimicrobial susceptibility testing. As part of the penicillin family, oxacillin is used to target Gram-positive bacteria by interfering with their cell wall synthesis. This larger 25g supply is ideal for laboratories needing bulk quantities for ongoing studies or antimicrobial screening procedures. Oxacillin is particularly important in the study of methicillin-resistant Staphylococcus aureus (MRSA) and other resistant pathogens. The product supports routine antimicrobial assays, including disk diffusion, MIC (Minimum Inhibitory Concentration) testing, and other bacterial resistance studies.