Nafcillin (sodium monohydrate) (Standard) is the analytical standard of Nafcillin (sodium monohydrate). This product is intended for research and analytical applications. Nafcillin sodium monohydrate, an antibiotic, is a reversible inhibitor of beta-lactamase. Nafcillin sodium monohydrate can be used for the research of staphylococcal infections[1][2].